Garmin D2 Mach 1 Pro vs D2 Mach 2 Pro
Size, specs & wrist fit compared
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Which one fits you
Both need much the same wrist — roughly 54–73mm across the flat of the wrist. Neither will fit where the other won't, so decide on thickness, weight and features instead.
The D2 Mach 1 Pro and D2 Mach 2 Pro share a near-identical 51mm case, so wrist presence comes down to thickness, lug-to-lug and weight.
The D2 Mach 1 Pro is the slimmer of the two (15mm vs 16.5mm), so it slides under a cuff more easily.
On the wrist the D2 Mach 2 Pro feels lighter (90g vs 126g, case only).
The D2 Mach 1 Pro is middle-of-the-pack for thickness among the 54 51mm watches in the database.
Among the 54 51mm watches we hold thickness for, the D2 Mach 2 Pro is thicker than 74% — it will sit high even though the case width reads modest.
The D2 Mach 1 Pro is 1.5mm thinner and 36g heavier than the D2 Mach 2 Pro. Both are circular.
D2™ Mach 1 Pro
D2 Mach 2 Pro
Case width
51mm
51mmsame
Lug-to-lug
51mm
51mmsame
Thickness
15mm
16.5mm+1.5mm
Weight
126g
90g−36g
Switch or add watches
Garmin
D2™ Mach 1 Pro
Garmin
D2 Mach 2 Pro
Fit tool
Watch Fit Tool
For sports watches, lug-to-lug (L2L) is what matters most — it decides whether a watch overhangs your wrist. Bulky is fine; overhang is not.
Your wrist
mm
≈ 146.9mm aroundHow to Measure Your Wrist
1
Measure at the point where you wear your watch — typically just below the wrist bone.
2
Flat width — lay your arm on a table, palm facing up, and measure straight across the top of your wrist with a ruler. Bone to bone; do not follow the curve down the sides.
3
Around — wrap a tape measure snugly round the wrist. No tape? Wrap a strip of paper, mark the overlap and hold the strip against a ruler.
⚠ Important
Width ≠ circumference. They are different numbers — around 170mm is about 64mm across — so set the toggle to whichever one you actually measured before you type it in.
Garmin D2™ Mach 1 Pro
Case 51.0mm · Lug-to-lug 51.0mm · Thickness 15.0mm · 126g
Sweet Spot
51mm on a 55mm wrist
Understated Balanced Sweet Spot Bold Overhang ⚠
Across the wrist it works — 2.0mm spare each side — but a tall watch on this wrist. Fine over a sleeve, awkward under one.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 51mm.
How to Measure
Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.
- 1. Flat width — arm flat on a table, palm up. Measure straight across the top of the wrist, bone to bone, ignoring the curve down the sides.
- 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Against one you know
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist2.0mm spare each side
Fills the wrist without reaching the edge.
- Off the wrist15.0mm off the skin
A tall watch on this wrist. Fine over a sleeve, awkward under one. (15.0mm case, back against the skin)
- How it seats~8.8mm under the rim
Wide enough that the edge of the case back lifts clear of the skin.
- Weight on the wrist126g
Substantial without being a burden — the usual weight of a steel watch on a wrist this size. (2.3g per mm of wrist)
Garmin D2 Mach 2 Pro
Case 51.0mm · Lug-to-lug 51.0mm · Thickness 16.5mm · 90g
Sweet Spot
51mm on a 55mm wrist
Understated Balanced Sweet Spot Bold Overhang ⚠
Across the wrist it works — 2.0mm spare each side — but a tall watch on this wrist. Fine over a sleeve, awkward under one.
On a 55mm wrist the sweet spot is 47–53mm lug to lug. This one is 51mm.
How to Measure
Measure where you wear it, just below the wrist bone. Either of these works — the tool converts between them.
- 1. Flat width — arm flat on a table, palm up. Measure straight across the top of the wrist, bone to bone, ignoring the curve down the sides.
- 2. Around — a tape, or a strip of paper marked and held against a ruler, snug the whole way round.
Against one you know
Leather: Attaches at the lugs, so the case back rests on your skin. Thins and softens with wear. Typical figures, not this model’s own.
Show the measurementsHide the measurements
- Across the wrist2.0mm spare each side
Fills the wrist without reaching the edge.
- Off the wrist16.5mm off the skin
A tall watch on this wrist. Fine over a sleeve, awkward under one. (16.5mm case, back against the skin)
- How it seats~8.8mm under the rim
Wide enough that the edge of the case back lifts clear of the skin.
- Weight on the wrist90g
Substantial without being a burden — the usual weight of a steel watch on a wrist this size. (1.6g per mm of wrist)
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
Highlight
- Garmin D2™ Mach 1 Pro51mm · 15mm thick
- Garmin D2 Mach 2 Pro51mm · 16.5mm thick
3D preview
D2™ Mach 1 Pro vs D2 Mach 2 Pro on a wrist
Sized to your own wrist, turned any way you like.
Shapes are built from published measurements, not manufacturer 3D models — accurate proportions, generic dial.
Battery life compared
Runtime for every power mode either watch publishes, 1 of them directly comparable.
1 Pro2 Pro
Battery Saver Smartwatch
41 days—Expedition GPS
27 days—Smartwatch
25 days24 daysMax battery GPS
145 hours—GPS only
82 hours—All satellite systems
62 hours—Fly activity
46 hours—All satellite systems with multi-band
38 hours—All satellite systems with music
17 hours—
Specifications
The short version
7 key specs| Spec | GarminD2™ Mach 1 Pro | GarminD2 Mach 2 Pro |
|---|---|---|
| Case Width | 51mm | 51mm |
| Thickness | 15mm | 16.5mm |
| Weight | 126g | 90g |
| Shape | Circular | Circular |
| Display type | AMOLED | AMOLED |
| Battery life | Smartwatch mode: Up to 25 days (10 days always-on) Battery Saver Smartwatch mode: Up to 41 days GPS only: Up to 82 hours (58 hours always-on ) All satellite systems: Up to 62 hours (48 hours always-on) All satellite systems with multi-band: Up to 38 hours (30 hours always-on) All satellite systems with music: Up to 17 hours Max battery GPS: Up to 145 hours Expedition GPS: Up to 27 days Fly activity (GPS + SpO2): Up to 46 hours | Smartwatch: Up to 24 days (12 days always-on) Battery Saver Watch Mode: Up to 34 days GPS Only: Up to 78 hours (56 hours always-on ) All Satellite Systems: Up to 60 hours (47 hours always-on) All Satellite Systems + Multi-band: Up to 53 hours (41 hours always-on)* All Satellite Systems + Multi-band + LTE Livetrack: Up to 21 hours (19 hours always-on)* All Satellite Systems + Multiband + Music: Up to 23 hours (21 hours always on)* All Satellite Systems + Multiband + Music + LTE Livetrack: Up to 15 hours (14 hours always on)* Max Battery GPS: Up to 123 hours Expedition GPS: Up to 24 days Fly Activity (GPS + SPO2): 59 hrs* *Assuming typical use with SatIQ technology |
| Released | 2023 | 2026 |
Every specification
656 specs| Spec | Garmin D2™ Mach 1 Pro | Garmin D2 Mach 2 Pro |
|---|---|---|
| Overview | ||
| Family | Garmin | Garmin |
| General | ||
| Battery life | Smartwatch mode: Up to 25 days (10 days always-on) Battery Saver Smartwatch mode: Up to 41 days GPS only: Up to 82 hours (58 hours always-on ) All satellite systems: Up to 62 hours (48 hours always-on) All satellite systems with multi-band: Up to 38 hours (30 hours always-on) All satellite systems with music: Up to 17 hours Max battery GPS: Up to 145 hours Expedition GPS: Up to 27 days Fly activity (GPS + SpO2): Up to 46 hours | Smartwatch: Up to 24 days (12 days always-on) Battery Saver Watch Mode: Up to 34 days GPS Only: Up to 78 hours (56 hours always-on ) All Satellite Systems: Up to 60 hours (47 hours always-on) All Satellite Systems + Multi-band: Up to 53 hours (41 hours always-on)* All Satellite Systems + Multi-band + LTE Livetrack: Up to 21 hours (19 hours always-on)* All Satellite Systems + Multiband + Music: Up to 23 hours (21 hours always on)* All Satellite Systems + Multiband + Music + LTE Livetrack: Up to 15 hours (14 hours always on)* Max Battery GPS: Up to 123 hours Expedition GPS: Up to 24 days Fly Activity (GPS + SPO2): 59 hrs* *Assuming typical use with SatIQ technology |
| Display Size | 1.4" (35.56 mm) diameter | 1.4” (35.56 mm) diameter |
| Case material | fiber-reinforced polymer with titanium rear cover | fiber-reinforced polymer with titanium rear cover |
| Color display | Yes | Yes |
| Lens Material | sapphire crystal | — |
| Bezel Material | titanium | — |
| Memory/History | 32 GB | 32 GB |
| Strap material | Titanium & silicone | leather and silicone |
| Charging method | Garmin proprietary plug charger | Garmin proprietary plug charger |
| Display resolution | 454 x 454 pixels | 454 x 454 pixels |
| QuickFit® watch band compatible | included (26 mm) | included (26 mm) |
| Weight | — | 90 g (case only: 65 g) |
| Battery type | — | Lithium ion |
| Lens material | — | sapphire crystal |
| Physical size | — | 51 x 51 x 16.5 mm Fits wrists with the following circumference: Silicone band: 127-210 mm Leather Band: 132-213 mm |
| Bezel material | — | titanium |
| Large font option | — | Yes |
| Built-in speaker/microphone | — | Yes |
| Leakproof inductive buttons | — | Yes |
| Sensors | ||
| GPS | Yes | — |
| Compass | Yes | — |
| GLONASS | Yes | — |
| Galileo | Yes | — |
| Gyroscope | Yes | — |
| Thermometer | Yes | — |
| Accelerometer | Yes | — |
| SatIQ™ Technology | Yes | — |
| Ambient light sensor | Yes | — |
| Barometric altimeter | Yes | — |
| Pulse Ox Blood Oxygen Saturation Monitor | Yes | — |
| Garmin Elevate™ wrist heart rate monitor | Yes | — |
| Stocks | — | Yes |
| Calendar | — | Yes |
| Passcode | — | Yes |
| Calculator | — | Yes |
| Color shift | — | Yes |
| Connectivity | — | LTE, Satellite, Bluetooth®, ANT+®, Wi-Fi® |
| Garmin Share | — | Yes |
| Find My Phone | — | Yes |
| Voice command | — | Yes |
| Evening report | — | Yes |
| Morning report | — | Yes |
| Red shift mode | — | Yes |
| Weather forecasts | — | Yes |
| Smart Notifications | — | Yes |
| Smart trainer control | — | Yes |
| Smartphone compatibility | — | iPhone®, Android™ |
| Controls smartphone music | — | Yes |
| On-device Connect IQ™ Store | — | Yes |
| Plays and controls watch music | — | Yes |
| Find My Phone during GPS activity | — | Yes |
| Pairs with Garmin Connect™ Mobile | — | Yes |
| Compatible with Garmin Messenger app | — | Yes |
| Find My Garmin (helps locate lost device) | — | Yes |
| Battery saver (customizable low power watch) | — | Yes |
| Bluetooth phone calling and voice assistant support | — | Yes |
| Realtime settings sync with Garmin Connect™ mobile | — | Yes |
| View images from notifications on watch (Android™ only) | — | Yes |
| Text response/reject phone call with text (Android™ only) | — | Yes |
| Connect IQ™ (downloadable watch faces, data fields and apps) | — | Yes |
| Product Info | ||
| Main SKU | 010-02804-80 | — |
| Product ID | 1398869 | — |
| Product Name | D2™ Mach 1 Pro | — |
| Release Date | 10/25/2023 | — |
| Product Variation | Aviator Smartwatch with Vented Titanium Bracelet | — |
| Clock Features | ||
| Timer | Yes | — |
| Stopwatch | Yes | — |
| Time/date | Yes | — |
| Alarm clock | Yes | — |
| GPS Time Sync | Yes | — |
| Sunrise/sunset times | Yes | — |
| Automatic daylight saving time | Yes | — |
| Sleep | — | yes (advanced) |
| Hydration | — | yes (in Garmin Connect™ and optional Connect IQ™ widget) |
| Breathwork | — | Yes |
| Meditation | — | Yes |
| Fitness age | — | Yes |
| Sleep coach | — | Yes |
| Health status | — | Yes |
| Nap detection | — | Yes |
| All-day stress | — | Yes |
| Women's health | — | yes (in Garmin Connect™ and optional Connect IQ™ widget) |
| Health snapshot | — | Yes |
| Jet lag adviser | — | Yes |
| Sleep alignment | — | Yes |
| Respiration rate | — | Yes |
| Skin temperature | — | Yes |
| Lifestyle logging | — | Yes |
| Resting heart rate | — | Yes |
| Breathing variations | — | Yes |
| Past ovulation estimates | — | Yes |
| Abnormal heart rate alerts | — | yes (high and low) |
| Relaxation breathing timer | — | Yes |
| Body Battery™ energy monitor | — | Yes |
| Heart rate (constant, every second) | — | Yes |
| Gaming Features | ||
| Gaming Activity | Yes | — |
| GameOn™ app compatible | Yes | — |
| Boating Features | ||
| Wearable trolling motor remote | Yes | — |
| TrueUp™ | — | Yes |
| Move IQ™ | — | Yes |
| Step counter | — | Yes |
| Floors climbed | — | Yes |
| Calories burned | — | Yes |
| Distance traveled | — | Yes |
| Intensity minutes | — | Yes |
| Automatic rep counting | — | Yes |
| Garmin Connect™ Challenges app | — | yes (optional Connect IQ app) |
| Move alerts (displays on device after a period of inactivity) | — | Yes |
| Auto goal (learns your activity level and assigns a daily step goal) | — | Yes |
| Cycling Features | ||
| Courses | Yes | — |
| MTB Grit & Flow | Yes | — |
| Race an activity | Yes | — |
| Power meter compatible | Yes | — |
| Advanced cycling dynamics | Yes | — |
| Power curve and % FTP workouts | Yes | — |
| Compatible with Varia™ lights | Yes | — |
| FTP (Functional Threshold Power) | yes (with compatible accessory) | — |
| Compatible with Varia headlight camera | Yes | — |
| Speed and cadence sensor support (w/sensor) | Yes | — |
| Cycle Map (routable cycling-specific street map) | Yes | — |
| Bike lap and lap maximum power (with power sensor) | Yes | — |
| Compatible with Varia™ radar (rear-facing radar) | Yes | — |
| Compatible with Vector™ and Rally™ (power meters) | Yes | — |
| Compatible with Varia Vision™ (head-mounted display) | Yes | — |
| Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories) | Yes | — |
| Pool swim workouts | — | Yes |
| Critical swim speed | — | Yes |
| Time and distance alerts | — | Yes |
| Auto rest (pool swim only) | — | Yes |
| Drill logging (pool swim only) | — | Yes |
| Pacing alerts (pool swim only) | — | Yes |
| Countdown start (pool swim only) | — | Yes |
| Underwater wrist-based heart rate | — | Yes |
| "Repeat on" rest timer (pool swim only) | — | Yes |
| Basic rest timer (up from 0) (pool swim only) | — | Yes |
| Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only) | — | Yes |
| Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories) | — | Yes |
| Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories) | — | Yes |
| Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim) | — | yes (with HRM-Swim, HRM-Pro, HRM-Pro Plus or HRM 600) |
| Golfing Features | ||
| PinPointer | Yes | — |
| Custom targets | Yes | — |
| Tempo Training | Yes | — |
| Virtual caddie | Yes | — |
| Full vector map | Yes | — |
| Handicap scoring | Yes | — |
| Tournament legal | Yes | — |
| Digital scorecard | Yes | — |
| Garmin AutoShot™ | Yes | — |
| PlaysLike distance | Yes | — |
| Round timer/odometer | Yes | — |
| Auto CourseView updates | Yes | — |
| Yardage to layups/doglegs | Yes | — |
| Hazards and course targets | Yes | — |
| Pairs with Garmin Golf app | Yes | — |
| Green View with manual pin position | Yes | — |
| Preloaded with 43,000 courses worldwide | Yes | — |
| Green Contours (with Garmin Golf membership) | Yes | — |
| CT10 Automatic club tracking compatible (requires accessory) | Yes | — |
| Yardage to F/M/B (distance to front, middle and back of green) | Yes | — |
| Stat tracking (strokes, putts per round, greens and fairways hit) | Yes | — |
| Wind speed and direction (requires connection to Garmin Golf app) | Yes | — |
| Touch-targeting (touch target on display to see the distance to any point) | Yes | — |
| Measures shot distance (calculates exact yardage for shots from anywhere on course) | automatic | — |
| Tides | — | Yes |
| Auto rest | — | Yes |
| Sight 'N Go | — | Yes |
| Tide glance | — | Yes |
| Fish forecast | — | Yes |
| UltraTrac mode | — | Yes |
| Vertical speed | — | Yes |
| GPS coordinates | — | Yes |
| Elevation profile | — | Yes |
| Projected waypoint | — | Yes |
| Total ascent/descent | — | Yes |
| Future elevation plot | — | Yes |
| Distance to destination | — | Yes |
| Expedition GPS Activity | — | Yes |
| Sun and moon information | — | Yes |
| Rest Timer (Ultra Run only) | — | Yes |
| Barometric trend indicator with storm alert | — | Yes |
| Running Features | ||
| Hill score | Yes | — |
| Run workouts | Yes | — |
| Running power | Yes | — |
| Race predictor | Yes | — |
| Foot pod capable | Yes | — |
| Running dynamics | Yes | — |
| Lactate threshold | yes (with compatible accessory) | — |
| Grade-adjusted pace | Yes | — |
| Trail run auto climb | Yes | — |
| Performance condition | Yes | — |
| Run/Walk/Stand detection | Yes | — |
| Stride length (real time) | Yes | — |
| PacePro™ Pacing Strategies | Yes | — |
| Vertical oscillation and ratio | Yes | — |
| Ground contact time and balance | yes (GCT balance with accessory) | — |
| GPS-based distance, time and pace | Yes | — |
| Course- and weather-specific race predictor | Yes | — |
| Cadence (provides real-time number of steps per minute) | Yes | — |
| PinPointer | — | Yes |
| Swing Tempo | — | Yes |
| Custom targets | — | Yes |
| Tempo Training | — | Yes |
| Virtual caddie | — | Yes |
| Full vector map | — | Yes |
| Handicap scoring | — | Yes |
| Tournament legal | — | Yes |
| Digital scorecard | — | Yes |
| Garmin AutoShot™ | — | Yes |
| PlaysLike distance | — | Yes |
| Round timer/odometer | — | Yes |
| Auto CourseView updates | — | Yes |
| Yardage to layups/doglegs | — | Yes |
| Hazards and course targets | — | Yes |
| Pairs with Garmin Golf app | — | Yes |
| Green View with manual pin position | — | Yes |
| Preloaded with 43,000 courses worldwide | — | Yes |
| Green Contours (with Garmin Golf membership) | — | Yes |
| CT1 Automatic club tracking compatible (requires accessory) | — | Yes |
| CT10 Automatic club tracking compatible (requires accessory) | — | Yes |
| Yardage to F/M/B (distance to front, middle and back of green) | — | Yes |
| Stat tracking (strokes, putts per round, greens and fairways hit) | — | Yes |
| Wind speed and direction (requires connection to Garmin Golf app) | — | Yes |
| Touch-targeting (touch target on display to see the distance to any point) | — | Yes |
| Measures shot distance (calculates exact yardage for shots from anywhere on course) | — | automatic |
| What You'll Love | ||
| Touchscreen | Yes | Yes |
| Display type | AMOLED | AMOLED |
| Water rating | 10 ATM | 10 ATM |
| Garmin Pay™ | Yes | Yes |
| Music storage | Yes | Yes |
| Garmin ECG App | Yes | Yes |
| LED flashlight | Yes | Yes |
| Multi-band GPS | Yes | Yes |
| Training status | yes (improved) | Yes |
| Built-in mapping | Yes | Yes |
| Training readiness | Yes | Yes |
| Pulse Ox blood oxygen | Yes | Yes |
| Sleep score and insights | Yes | Yes |
| Battery life (smartwatch mode) | Up to 25 days (10 days always-on) | Up to 24 days (12 days always-on) |
| Timer | — | Yes |
| Stopwatch | — | Yes |
| Time/date | — | Yes |
| Alarm clock | — | Yes |
| GPS Time Sync | — | Yes |
| Smart wake alarm | — | Yes |
| LTE communication | — | yes (inReach plan required, coverage details) |
| Sunrise/sunset times | — | Yes |
| Satellite communication | — | yes (inReach plan required, coverage details) |
| Alarm clock with time zones | — | Yes |
| Automatic daylight saving time | — | Yes |
| Make calls and send texts via voice | — | Yes |
| Activity Profiles | ||
| Gym | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing | — |
| Swim | Pool Swimming, Open Water Swimming | — |
| Cycling | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX | — |
| Wellness | Walking, Pilates, Yoga, Indoor Walking | — |
| Multisport | Swimming/Running, Triathlon | — |
| In the ring | Boxing, Mixed Martial Arts | — |
| Team sports | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball | — |
| Motor sports | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling | — |
| On the Water | Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Sailing, Sail Racing, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Snorkeling, Sailing Expedition, Whitewater | — |
| Racket sports | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball | — |
| Snow & winter | Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, Backcountry Skiing, Ice Skating, Snowshoeing | — |
| Indoor running | Treadmill Running, Indoor Track Running, Virtual Running | — |
| Outdoor running | Running, Outdoor Track Running, Trail Running, Ultra Running | — |
| Outdoor recreation | Hiking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery | — |
| Other activity profiles | Jumpmaster, Tactical | — |
| Assistance | — | Yes |
| Location tracking | — | Yes |
| Live Event Sharing | — | Yes |
| Incident Detection during select activities | — | Yes |
| Incident detection alert on phone for wearables | — | Yes |
| Aviation Features | ||
| Aviation Alerts | Yes | — |
| MOS & Meteogram | Yes | — |
| In-flight Pulse Ox | Yes | — |
| NEXRAD on moving map | Yes | — |
| Waypoint information page | Yes | — |
| Density altitude calculator | Yes | — |
| Fly activity emergency mode | Yes | — |
| Connext avionics connectivity | Yes | — |
| Worldwide airport database(s) | Yes | — |
| Multiple time zones with Zulu/UTC | Yes | — |
| TAF (Terminal Aerodrome Forecast) | Yes | — |
| Altimeter with adjustable baro setting | Yes | — |
| METAR (Meteorological Aerodrome Report) | Yes | — |
| Worldwide NAVAID and Intersection database(s) | Yes | — |
| Wirelessly receive flight plans from Garmin Pilot™ | Yes | — |
| 3-axis compass with HSI (horizontal situation indicator) | Yes | — |
| Moving Map with aviation airports, navaids, roads, bodies of water and more | Yes | — |
| Wearable trolling motor remote | — | Yes |
| Swimming Features | ||
| Pool swim workouts | Yes | — |
| Critical swim speed | Yes | — |
| Time and distance alerts | Yes | — |
| Auto rest (pool swim only) | Yes | — |
| Drill logging (pool swim only) | Yes | — |
| Pacing alerts (pool swim only) | Yes | — |
| Countdown start (pool swim only) | Yes | — |
| Underwater wrist-based heart rate | Yes | — |
| "Repeat on" rest timer (pool swim only) | Yes | — |
| Basic rest timer (up from 0) (pool swim only) | Yes | — |
| Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only) | Yes | — |
| Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories) | Yes | — |
| Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories) | Yes | — |
| Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim) | yes (with HRM-Tri, HRM-Swim, HRM-Pro or HRM-Pro Plus) | — |
| Tactical Features | ||
| Kill switch | Yes | — |
| Stealth Mode | Yes | — |
| XERO™ Locations | Yes | — |
| Dual grid coordinates | Yes | — |
| PO2 | — | up to 1.6 with customizable Deco settings |
| Tides | — | Yes |
| Backlight | — | yes (configurable intensity; always on) |
| Gas mixes | — | Air, Nitrox (21-40% Oxygen) |
| APNEA mode | — | Yes |
| Deep Stops | — | yes (using custom Gradient Factors) |
| No fly time | — | Yes |
| Safety Stop | — | yes (customizable off/3min/5min) |
| Dive planner | — | yes (Basic NDL & Gas Planner) |
| Nitrox support | — | Yes |
| Single-gas mode | — | Yes |
| Alerts and alarms | — | yes (vibration only) |
| 3-axis dive compass | — | yes with adjustable heading, quick change to 90R, 90L, and Reciprocal. Indicates degrees and direction back to set heading. |
| Auto start/end dive | — | Yes |
| Decompression model | — | Bühlmann ZHL-16c with Gradient Factors |
| Missed Deco Lockout | — | yes (can be disabled prior to dive with user acknowledgement) |
| Custom end-dive timeout | — | yes (20 sec to 10 min) |
| Customizable conservatism | — | yes (Low/Medium/High) |
| Surface diver status widget | — | yes (Surface Interval, no fly time, N2 loading, CNS, OTU, and Tissue Compartment status) |
| Automatic altitude adjustment | — | Yes |
| Dive ascent/descent rate indicator | — | Yes |
| Dive activity maximum operating depth | — | 40 meters |
| Sync dive log to Garmin Dive™ Mobile app | — | Yes |
| Automatically saves dive entry and exit locations | — | Yes |
| Outdoor Recreation | ||
| Tides | yes (via Connect IQ™) | — |
| Up Ahead | Yes | Yes |
| Auto rest | Yes | — |
| TracBack® | Yes | Yes |
| Sight 'N Go | Yes | — |
| Tide glance | Yes | — |
| Back to start | Yes | Yes |
| Fish forecast | Yes | — |
| Explore Nearby | Yes | Yes |
| UltraTrac mode | Yes | — |
| Vertical speed | Yes | — |
| GPS coordinates | Yes | — |
| Reference point | Yes | — |
| Area calculation | yes (via Connect IQ™) | — |
| Elevation profile | Yes | — |
| Projected waypoint | Yes | — |
| Total ascent/descent | Yes | — |
| Future elevation plot | Yes | — |
| NextFork™ navigation | Yes | Yes |
| Distance to destination | Yes | — |
| Expedition GPS Activity | Yes | — |
| Sun and moon information | Yes | — |
| Point-to-point navigation | Yes | Yes |
| Preloaded ski resort maps | Yes | Yes |
| ClimbPro™ Ascent Planner | Yes | Yes |
| Rest Timer (Ultra Run only) | Yes | — |
| Preloaded road and trail maps | Yes | Yes |
| Bread crumb trail in real time | Yes | Yes |
| Downloadable cartography support | Yes | Yes |
| Barometric trend indicator with Storm Alert | Yes | — |
| Daily Smart Features | ||
| Stocks | Yes | — |
| Calendar | Yes | — |
| Connectivity | Bluetooth®, ANT+®, Wi-Fi® | — |
| Garmin Share | Yes | — |
| Find My Phone | Yes | — |
| Find My Watch | Yes | — |
| VIRB® Remote | Yes | — |
| Morning report | Yes | — |
| Red shift mode | Yes | — |
| Weather forecasts | Yes | — |
| Smart Notifications | Yes | — |
| Smart trainer control | Yes | — |
| Smartphone compatibility | iPhone®, Android™ | — |
| Controls smartphone music | Yes | — |
| On-device Connect IQ™ Store | Yes | — |
| Plays and controls watch music | Yes | — |
| Find My Phone during GPS activity | Yes | — |
| Pairs with Garmin Connect™ Mobile | Yes | — |
| Compatible with Garmin Messenger app | Yes | — |
| Battery saver (customizable low power watch) | Yes | — |
| Realtime settings sync with Garmin Connect™ mobile | Yes | — |
| Text response/reject phone call with text (Android™ only) | Yes | — |
| Connect IQ™ (downloadable watch faces, data fields and apps) | Yes | — |
| LTE weather | — | yes (coverage details) |
| LTE LiveTrack | — | yes (coverage details) |
| Text messaging | — | yes (coverage details) |
| Interactive SOS | — | yes (satellite & LTE; coverage details) |
| Location check-ins | — | yes (satellite & LTE; coverage details) |
| LTE voice messaging | — | yes (coverage details) |
| Two-way voice calls | — | yes (coverage details) |
| Satellite text messaging | — | yes (coverage details) |
| Activity Tracking Features | ||
| TrueUp™ | Yes | — |
| Move IQ™ | Yes | — |
| Step counter | Yes | — |
| Floors climbed | Yes | — |
| Calories burned | Yes | — |
| Distance traveled | Yes | — |
| Intensity minutes | Yes | — |
| Automatic rep counting | Yes | — |
| Garmin Connect™ Challenges app | yes (optional Connect IQ app) | — |
| Move alerts (displays on device after a period of inactivity) | Yes | — |
| Auto goal (learns your activity level and assigns a daily step goal) | Yes | — |
| % HRR | — | Yes |
| % HR max | — | Yes |
| HR zones | — | Yes |
| HR alerts | — | Yes |
| Shortcuts | — | Yes |
| HRV status | — | Yes |
| Load ratio | — | Yes |
| Manual lap | — | Yes |
| Rest timer | — | Yes |
| Auto max HR | — | Yes |
| Auto scroll | — | Yes |
| Finish time | — | Yes |
| HR calories | — | Yes |
| Voice alerts | — | Yes |
| Custom alerts | — | Yes |
| Physio TrueUp | — | Yes |
| Recovery time | — | Yes |
| Training load | — | Yes |
| VO2 Max (Run) | — | Yes |
| Course guidance | — | Yes |
| Endurance score | — | Yes |
| Training effect | — | Yes |
| Virtual Partner | — | Yes |
| Workout benefit | — | Yes |
| Race an Activity | — | Yes |
| Realtime stamina | — | Yes |
| Advanced workouts | — | Yes |
| Interval training | — | Yes |
| Race glance/widget | — | Yes |
| Training load focus | — | Yes |
| VO2 Max (Trail Run) | — | Yes |
| Garmin Live Segments | — | Yes |
| Strava Live Segments | — | Yes |
| GPS speed and distance | — | Yes |
| Configurable lap alerts | — | Yes |
| Customizable data pages | — | Yes |
| Unified training status | — | Yes |
| Touch and/or button lock | — | Yes |
| Activity history on watch | — | Yes |
| Multisport auto transition | — | Yes |
| Downloadable training plans | — | Yes |
| Training effect (anaerobic) | — | Yes |
| Manual multisport activities | — | Yes |
| HRM running pace and distance | — | Yes |
| Heat and altitude acclimation | — | Yes |
| Customizable activity profiles | — | Yes |
| Trendline™ Popularity Routing | — | Yes |
| Auto Pause® automatic timer halt | — | Yes |
| Respiration rate (during exercise) | — | yes (with compatible accessory) |
| Auto Lap® interval tracking feature | — | Yes |
| Primary benefit (Training Effect labels) | — | Yes |
| Round-trip course creator (running/cycling) | — | Yes |
| Power Modes - customizable in-activity battery settings | — | Yes |
| HR broadcast (broadcasts HR data over ANT+® to paired devices) | — | Yes |
| Improved interval (includes open repeats, intervals data page, rest screen and auto detection) | — | Yes |
| HRV stress test (measures your heart rate variability while standing still, for 3 minutes, to provide you with an estimated stress level; the scale of this is 1 to 100; low scores indicate lower stress levels) | — | yes (with compatible accessory) |
| Workout and Training Plans | ||
| HIIT workouts | Yes | — |
| Yoga workouts | Yes | — |
| Cardio workouts | Yes | — |
| Pilates workouts | Yes | — |
| Strength workouts | Yes | — |
| Garmin Cycling Coach | Yes | — |
| Garmin Running Coach | Yes | — |
| Garmin Running Coach Experts | Yes | — |
| On-screen workout animations | Yes | — |
| On-screen workout muscle maps | Yes | — |
| Daily Suggested Workout - Cycling | Yes | — |
| Daily Suggested Workout - Running | Yes | — |
| Garmin Coach - Prebuilt Cycling Plans | Yes | — |
| Gym | — | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing, Jump Roping |
| Dive | — | Scuba Diving (single gas), Apnea Diving |
| Swim | — | Pool Swimming, Open Water Swimming |
| Cycling | — | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX |
| Wellness | — | Walking, Indoor Walking, Pilates, Yoga, Mobility |
| Multisport | — | Swimming/Running, Triathlon |
| In the ring | — | Boxing, Mixed Martial Arts |
| Team sports | — | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball |
| Motor sports | — | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling |
| On the water | — | Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Sailing, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Snorkeling, Whitewater |
| Racket sports | — | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball |
| Indoor running | — | Treadmill Running, Indoor Track Running, Virtual Running |
| Outdoor running | — | Running, Outdoor Track Running, Trail Running, Ultra Running, Obstacle Racing |
| Snow and winter | — | Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, XC Skate Skiing, Backcountry Skiing, Ice Skating, Snowshoeing |
| Outdoor recreation | — | Hiking, Rucking, Indoor Climbing, Bouldering, Mountaineering, Hunting, Horseback Riding, Golfing, Disc Golf, Archery |
| Other activity profiles | — | Inline Skating |
| Health & Wellness Monitoring | ||
| Sleep | yes (advanced) | — |
| Hydration | yes (in Garmin Connect™ and optional Connect IQ™ widget) | — |
| Breathwork | Yes | — |
| Fitness age | yes (in app) | — |
| All-day stress | Yes | — |
| Women's health | yes (in Garmin Connect™ and optional Connect IQ™ widget) | — |
| Health snapshot | Yes | — |
| Jet lag adviser | Yes | — |
| Respiration rate | Yes | — |
| Resting heart rate | Yes | — |
| Breathing variations | Yes | — |
| Abnormal heart rate alerts | yes (high and low) | — |
| Relaxation breathing timer | Yes | — |
| Body Battery™ energy monitor | Yes | — |
| Wrist-based heart rate (constant, every second) | Yes | — |
| GPS | — | Yes |
| QZSS | — | Yes |
| BeiDou | — | Yes |
| Compass | — | Yes |
| GLONASS | — | Yes |
| Galileo | — | Yes |
| Gyroscope | — | Yes |
| Thermometer | — | Yes |
| Depth sensor | — | yes (to 40 m) |
| Accelerometer | — | Yes |
| SatIQ™ Technology | — | Yes |
| Ambient light sensor | — | Yes |
| Barometric altimeter | — | Yes |
| Pulse Ox Blood Oxygen Saturation Monitor | — | Yes |
| Garmin Elevate™ wrist heart rate monitor | — | Yes |
| Safety and Tracking Features | ||
| Assistance | Yes | — |
| Live Event Sharing | Yes | — |
| Incident Detection during select activities | Yes | — |
| Incident detection alert on phone for wearables | Yes | — |
| Kill switch | — | Yes |
| Stealth mode | — | Yes |
| Ballistics solver | — | Yes |
| Night vision mode | — | Yes |
| Dual grid coordinates | — | Yes |
| Kid Activity Tracking Features | ||
| Toe-to-Toe™ Challenges app | yes (optional Connect IQ Toe-to-Toe™ Challenges app) | — |
| Training, Planning and Analysis Features | ||
| % HRR | Yes | — |
| % HR max | Yes | — |
| HR zones | Yes | — |
| HR alerts | Yes | — |
| Shortcuts | Yes | — |
| HRV status | Yes | — |
| Load ratio | Yes | — |
| Manual lap | Yes | — |
| Rest timer | Yes | — |
| Auto max HR | Yes | — |
| Auto scroll | Yes | — |
| Finish time | Yes | — |
| HR calories | Yes | — |
| Voice alerts | Yes | — |
| Custom alerts | Yes | — |
| Physio TrueUp | Yes | — |
| Recovery time | Yes | — |
| Training load | Yes | — |
| VO2 Max (Run) | Yes | — |
| Course guidance | Yes | — |
| Endurance score | Yes | — |
| Training effect | Yes | — |
| Virtual Partner | Yes | — |
| Race an Activity | Yes | — |
| Realtime stamina | Yes | — |
| Advanced workouts | Yes | — |
| Interval training | Yes | — |
| Race glance/widget | Yes | — |
| Training load focus | Yes | — |
| VO2 Max (Trail Run) | Yes | — |
| Garmin Live Segments | Yes | — |
| Strava Live Segments | Yes | — |
| GPS speed and distance | Yes | — |
| Improved recovery time | Yes | — |
| Configurable lap alerts | Yes | — |
| Customizable data pages | Yes | — |
| Unified training status | Yes | — |
| Touch and/or button lock | Yes | — |
| Activity history on watch | Yes | — |
| Downloadable training plans | Yes | — |
| Training effect (anaerobic) | Yes | — |
| Manual multisport activities | Yes | — |
| HRM running pace and distance | Yes | — |
| Heat and altitude acclimation | Yes | — |
| Customizable activity profiles | Yes | — |
| Trendline™ Popularity Routing | Yes | — |
| Auto Pause® automatic timer halt | Yes | — |
| Respiration rate (during exercise) | yes (with compatible accessory) | — |
| Auto Lap® interval tracking feature | Yes | — |
| Primary benefit (Training Effect labels) | Yes | — |
| Round-trip course creator (running/cycling) | Yes | — |
| Power Modes - customizable in-activity battery settings | Yes | — |
| HR broadcast (broadcasts HR data over ANT+® to paired devices) | Yes | — |
| Improved interval (includes open repeats, intervals data page, rest screen and auto detection) | Yes | — |
| HRV stress test (measures your heart rate variability while standing still, for 3 minutes, to provide you with an estimated stress level; the scale of this is 1 to 100; low scores indicate lower stress levels) | yes (with compatible accessory) | — |
| Hill score | — | Yes |
| Run workouts | — | Yes |
| Running power | — | Yes |
| Race predictor | — | Yes |
| Running Economy | — | yes (with compatible accessory) |
| Step speed loss | — | yes (with compatible accessory) |
| Foot pod capable | — | Yes |
| Running dynamics | — | Yes |
| Lactate threshold | — | Yes |
| Running Tolerance | — | Yes |
| Grade-adjusted pace | — | Yes |
| Trail run auto climb | — | Yes |
| Performance condition | — | Yes |
| Run/Walk/Stand detection | — | Yes |
| Stride length (real time) | — | Yes |
| PacePro™ Pacing Strategies | — | Yes |
| Projected race time and pace | — | Yes |
| Vertical oscillation and ratio | — | Yes |
| Ground contact time and balance | — | yes (GCT balance with accessory) |
| GPS-based distance, time and pace | — | Yes |
| Course- and weather-specific race predictor | — | Yes |
| Cadence (provides real-time number of steps per minute) | — | Yes |
| Variant | ||
| Color | — | Carbon Gray DLC Titanium with Chestnut Leather Band |
| Version | — | D2 Mach 2 Pro |
| Case Size | — | 51 mm |
| Solar Charging | — | No |
| Diving Features | ||
| Aviation Alerts | — | Yes |
| Personal minimums | — | Yes |
| In-flight Pulse Ox | — | Yes |
| NEXRAD on moving map | — | Yes |
| Connext avionics connectivity | — | Yes |
| Worldwide airport database(s) | — | Yes |
| Multiple time zones with Zulu/UTC | — | Yes |
| TAF (Terminal Aerodrome Forecast) | — | Yes |
| Altimeter with adjustable baro setting | — | Yes |
| METAR (Meteorological Aerodrome Report) | — | Yes |
| Worldwide NAVAID and Intersection database(s) | — | Yes |
| Wirelessly receive flight plans from Garmin Pilot™ | — | Yes |
| 3-axis compass with HSI (horizontal situation indicator) | — | Yes |
| Moving Map with aviation airports, navaids, roads, bodies of water and more | — | Yes |
| Mapping & Navigation | ||
| Courses | — | Yes |
| Power guide | — | Yes |
| MTB Grit & Flow | — | Yes |
| Race an activity | — | Yes |
| Power meter compatible | — | Yes |
| Advanced cycling dynamics | — | Yes |
| Power curve and % FTP workouts | — | Yes |
| Compatible with Varia™ lights | — | Yes |
| FTP (Functional Threshold Power) | — | yes (with compatible accessory) |
| Compatible with Varia headlight camera | — | Yes |
| Speed and cadence sensor support (w/sensor) | — | Yes |
| Cycle Map (routable cycling-specific street map) | — | Yes |
| Bike lap and lap maximum power (with power sensor) | — | Yes |
| Compatible with Varia™ radar (rear-facing radar) | — | Yes |
| Compatible with Vector™ and Rally™ (power meters) | — | Yes |
| Compatible with Varia Vision™ (head-mounted display) | — | Yes |
| Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories) | — | Yes |
| Communication Features (with Subscription) | ||
| HIIT workouts | — | Yes |
| Yoga workouts | — | Yes |
| Cardio workouts | — | Yes |
| Pilates workouts | — | Yes |
| Strength workouts | — | Yes |
| Multisport workouts | — | Yes |
| Garmin Cycling Coach | — | Yes |
| Garmin Running Coach | — | Yes |
| Garmin Triathlon Coach | — | Yes |
| Garmin Coach - Strength | — | Yes |
| Garmin Running Coach Experts | — | Yes |
| On-screen workout animations | — | Yes |
| On-screen workout muscle maps | — | Yes |
| Garmin Coach - Prebuilt Cycling Plans | — | Yes |
| Daily Suggested Workout - Cycling (Pace and Heart Rate Based) | — | Yes |
| Daily Suggested Workout - Running (Pace and Heart Rate Based) | — | Yes |
Wrist Fit
Garmin D2 Mach 1 Pro
Sits best on wrists ~54–73mm wide (≈ 14.4–19.5cm circumference).
Garmin D2 Mach 2 Pro
Sits best on wrists ~54–73mm wide (≈ 14.4–19.5cm circumference).
Frequently Asked Questions
Is the Garmin D2 Mach 1 Pro bigger than the Garmin D2 Mach 2 Pro?
Both have a 51mm case. Compare their thickness and lug-to-lug above to judge wrist presence.
Which fits a smaller wrist better, the Garmin D2 Mach 1 Pro or the Garmin D2 Mach 2 Pro?
The Garmin D2 Mach 1 Pro suits wrists around 54–73mm wide, and the Garmin D2 Mach 2 Pro around 54–73mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Garmin D2 Mach 1 Pro and Garmin D2 Mach 2 Pro side by side at true scale?
Yes — the schematics and photos above show both watches at matched scale, and our fit tool overlays each on your wrist width.