Garmin
Descent™ G2 vs Descent™ Mk3i – 43 mm
Size, specs & wrist fit compared
As an Amazon Associate, WatchFitTool earns from qualifying purchases.
Which one fits you
On wrists narrower than about 48mm, the Descent™ Mk3i – 43 mm is the safer pick — it stays proportionate down to roughly 45mm, where the Descent™ G2 starts to hang over the edge. Above 48mm both sit cleanly, and the Descent™ G2 gives you more presence.
The Descent™ G2 wears larger than the Descent™ Mk3i – 43 mm (45.5mm vs 43mm case), giving it more wrist presence — and needing a wider wrist to sit cleanly.
The Descent™ Mk3i – 43 mm is the slimmer of the two (14.3mm vs 15.2mm), so it slides under a cuff more easily.
On the wrist the Descent™ Mk3i – 43 mm feels lighter (49.3g vs 65g, case only).
The Descent™ G2 is thicker than 81% of the 46mm watches we track and the Descent™ Mk3i – 43 mm than 74% of the 43mm ones — so both sit higher than their widths suggest.
The Descent™ G2 is 2.5mm wider, 2.5mm longer, 0.9mm thicker and 15.7g heavier than the Descent™ Mk3i – 43 mm. Both are circular.
Descent™ G2
Descent™ Mk3i – 43 mm
Case width
45.5mm
43mm−2.5mm
Lug-to-lug
45.5mm
43mm−2.5mm
Thickness
15.2mm
14.3mm−0.9mm
Weight
65g
49.3g−15.7g
Switch or add watches
Garmin
Descent™ G2
Garmin
Descent™ Mk3i – 43 mm
2D Dimension Schematics
Every case drawn to scale on a shared centre — from above, and in profile against the wrist.
Highlight
- Garmin Descent™ G245.5mm · 15.2mm thick
- Garmin Descent™ Mk3i – 43 mm43mm · 14.3mm thick
3D preview
Descent™ G2 vs Descent™ Mk3i – 43 mm 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
Furthest apart in GPS Only mode, where the Mk3i – 43 mm lasts 1.4× as long as the G2 (28 hours against 20 hours).
G2Mk3i – 43 mm
Battery Saver
12 days12 daysSmartwatch
10 days10 daysExpedition GPS
10 days10 daysMax Battery GPS
44 hours44 hoursDive
27 hours30 hoursGPS Only
20 hours28 hoursAll Satellite Systems
15 hours20 hoursAll Satellite Systems + Multi-band
—17 hoursDive with Air Integration
—15 hoursAll Satellite Systems + Music
—6 hours
Specifications
The short version
7 key specs| Spec | GarminDescent™ G2 | GarminDescent™ Mk3i – 43 mm |
|---|---|---|
| Case Width | 45.5mm | 43mm |
| Thickness | 15.2mm | 14.3mm |
| Weight | 65g | 49.3g |
| Shape | Circular | Circular |
| Display type | AMOLED | AMOLED |
| Battery life | Dive Mode: Up to 27 hours Smartwatch: Up to 10 days (4 days always-on) Battery Saver Watch Mode: Up to 12 days GPS Only: Up to 20 hours All Satellite Systems: Up to 15 hours Max Battery GPS: Up to 44 hours Expedition GPS: Up to 10 days | Smartwatch: Up to 10 days (4 days always-on) Battery Saver Watch Mode: Up to 12 days GPS Only: Up to 28 hours (22 hours always-on ) All Satellite Systems: Up to 20 hours (16 hours always-on) All Satellite Systems + Multi-band: Up to 17 hours (14 hours always-on) All Satellite Systems + Music: Up to 6 hours Max Battery GPS: Up to 44 hours Expedition GPS: Up to 10 days Dive Mode: Up to 30 hours Dive Mode with Air Integration: Up to 15 hours |
| Released | 2025 | 2023 |
Every specification
352 specs| Spec | Garmin Descent™ G2 | Garmin Descent™ Mk3i – 43 mm |
|---|---|---|
| Overview | ||
| Family | Garmin | Garmin |
| General | ||
| Battery life | Dive Mode: Up to 27 hours Smartwatch: Up to 10 days (4 days always-on) Battery Saver Watch Mode: Up to 12 days GPS Only: Up to 20 hours All Satellite Systems: Up to 15 hours Max Battery GPS: Up to 44 hours Expedition GPS: Up to 10 days | Smartwatch: Up to 10 days (4 days always-on) Battery Saver Watch Mode: Up to 12 days GPS Only: Up to 28 hours (22 hours always-on ) All Satellite Systems: Up to 20 hours (16 hours always-on) All Satellite Systems + Multi-band: Up to 17 hours (14 hours always-on) All Satellite Systems + Music: Up to 6 hours Max Battery GPS: Up to 44 hours Expedition GPS: Up to 10 days Dive Mode: Up to 30 hours Dive Mode with Air Integration: Up to 15 hours |
| Display Size | 1.2" (30.4 mm) diameter | 1.2” (30.4 mm) diameter |
| Case material | fiber-reinforced ocean-bound plastic | fiber-reinforced polymer with titanium rear cover |
| Color display | Yes | Yes |
| Lens Material | sapphire crystal | sapphire crystal |
| Bezel Material | fiber-reinforced ocean-bound plastic | Diamond-like Carbon (DLC) coated titanium or bronze PVD coated titanium |
| Memory/History | 4 GB | 32 GB |
| Strap material | silicone | silicone |
| Charging method | Garmin proprietary clip charger | Garmin proprietary clip charger |
| Large font option | Yes | Yes |
| Display resolution | 390 x 390 pixels | 390 x 390 pixels |
| Leakproof inductive buttons | Yes | Yes |
| QuickFit® watch band compatible | yes (22 mm) | yes (20 mm) |
| Sensors | ||
| GPS | Yes | Yes |
| Compass | Yes | Yes |
| GLONASS | Yes | Yes |
| Galileo | Yes | Yes |
| Gyroscope | Yes | Yes |
| Thermometer | Yes | Yes |
| Depth sensor | Yes | Yes |
| Accelerometer | Yes | Yes |
| Barometric altimeter | Yes | Yes |
| Pulse Ox Blood Oxygen Saturation Monitor | Yes | Yes |
| Garmin Elevate™ wrist heart rate monitor | Yes | Yes |
| SatIQ™ Technology | — | Yes |
| Ambient light sensor | — | Yes |
| Product Info | ||
| Main SKU | 010-02986-00 | 010-02753-13 |
| Product ID | 1558977 | 852217 |
| Product Name | Descent™ G2 | Descent™ Mk3i – 43 mm |
| Release Date | 2/14/2025 | 11/15/2023 |
| Product Variation | Black with Black Band | Bronze PVD Titanium with French Gray Silicone Band |
| Clock Features | ||
| Timer | Yes | Yes |
| Stopwatch | Yes | Yes |
| Time/date | Yes | Yes |
| Alarm clock | Yes | Yes |
| GPS Time Sync | Yes | Yes |
| Sunrise/sunset times | Yes | Yes |
| Automatic daylight saving time | Yes | Yes |
| Diving Features | ||
| PO2 | Up to 2.0 with customizable deco PO2 setting | Up to 2.0 with customizable deco PO2 setting |
| Tides | Yes | Yes |
| Backlight | yes (configurable time and intensity; auto-on at depth) | yes (configurable time and intensity; auto-on at depth) |
| Gas mixes | Air, Nitrox and Trimix up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gasses. | Air, Nitrox and Trimix, up to 100% O2; 1 bottom gas and up to 11 deco and/or backup gasses. |
| APNEA mode | Yes | Yes |
| Deep Stops | yes (using custom gradient factors) | yes (using custom gradient factors) |
| Gauge mode | Yes | Yes |
| Pool APNEA | Yes | Yes |
| No fly time | Yes | Yes |
| Safety Stop | yes (customizable off/3min/5min) | yes (customizable off/3min/5min) |
| Dive planner | yes (basic NDL + multi-gas deco planner) | yes (basic NDL + multi-gas deco planner) |
| Dive readiness | Yes | — |
| Multi-gas mode | Yes | Yes |
| Nitrox support | Yes | Yes |
| Trimix support | Yes | Yes |
| APNEA hunt mode | Yes | Yes |
| Alerts & alarms | Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching. Customizable (up to 40) audible and/or vibration per dive mode, based on depth or time | Audible and vibration alarms for ascent rate, PO2, CNS/OTU, NDL, deco, gas switching, tank pressure, gas consumption rate. Customizable (up to 40) audible and/or vibration per dive mode, based on depth or time |
| Single-gas mode | Yes | Yes |
| 3-axis dive compass | yes (with adjustable heading, quick change to 90R, 90L and reciprocal). Indicates degrees and direction back to set heading | yes (with adjustable heading, quick change to 90R, 90L and reciprocal). Indicates degrees and direction back to set heading |
| Auto start/end dive | Yes | Yes |
| Decompression model | Bühlmann ZHL-16c with gradient factors | Bühlmann ZHL-16c with gradient factors |
| Missed Deco Lockout | yes (can be disabled prior to dive with user acknowledgement) | yes (can be disabled prior to dive with user acknowledgement) |
| Custom end-dive timeout | yes (20s to 10 m) | yes (20s to 10 m) |
| Custom dive data screens | Yes | Yes |
| Customizable conservatism | yes (low/medium/high or custom using gradient factors) | yes (low/medium/high or custom using gradient factors) |
| Surface diver status widget | yes (surface interval, N2/HE loading, CNS, OTU and tissue compartment status) | yes (surface interval, N2/HE loading, CNS, OTU and tissue compartment status) |
| Automatic altitude adjustment | Yes | Yes |
| Residual Tissue Loading Reset | yes (on the surface with user acknowledgement) | yes (on the surface with user acknowledgement) |
| Closed Circuit Rebreather (CCR) | Yes | Yes |
| Dive ascent/descent rate indicator | Yes | Yes |
| Dive activity maximum operating depth | 100 meters | 200 meters |
| Sync dive log to Garmin Dive™ Mobile app | Yes | Yes |
| Automatically saves dive entry and exit locations | Yes | Yes |
| Air integration | — | yes (via Subwave™) |
| Gas time remaining | — | Yes |
| Subwave™ Support | — | Yes |
| Gas consumption rate | — | Yes |
| Number of transmitters supported | — | 8 |
| Gaming Features | ||
| Gaming Activity | Yes | Yes |
| GameOn™ app compatible | Yes | Yes |
| Cycling Features | ||
| Courses | Yes | Yes |
| MTB Grit & Flow | Yes | Yes |
| Race an activity | Yes | Yes |
| Power meter compatible | Yes | Yes |
| Advanced cycling dynamics | Yes | Yes |
| Compatible with Varia™ lights | Yes | Yes |
| FTP (Functional Threshold Power) | yes (with compatible accessory) | yes (with compatible accessory) |
| Speed and cadence sensor support (w/sensor) | Yes | Yes |
| Bike lap and lap maximum power (with power sensor) | Yes | Yes |
| Compatible with Varia™ radar (rear-facing radar) | Yes | Yes |
| Compatible with Vector™ and Rally™ (power meters) | Yes | Yes |
| Compatible with Varia Vision™ (head-mounted display) | Yes | Yes |
| Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories) | Yes | Yes |
| Power guide | — | Yes |
| Power curve and % FTP workouts | — | Yes |
| Compatible with Varia headlight camera | — | Yes |
| Cycle Map (routable cycling-specific street map) | — | Yes |
| Golfing Features | ||
| Tournament legal | Yes | Yes |
| Digital scorecard | Yes | Yes |
| Garmin AutoShot™ | Yes | Yes |
| Round timer/odometer | Yes | Yes |
| Auto CourseView updates | Yes | Yes |
| Yardage to layups/doglegs | Yes | Yes |
| Hazards and course targets | Yes | Yes |
| Pairs with Garmin Golf app | Yes | Yes |
| Green View with manual pin position | Yes | Yes |
| CT10 Automatic club tracking compatible (requires accessory) | Yes | Yes |
| Yardage to F/M/B (distance to front, middle and back of green) | Yes | Yes |
| Stat tracking (strokes, putts per round, greens and fairways hit) | Yes | Yes |
| Measures shot distance (calculates exact yardage for shots from anywhere on course) | manual | automatic |
| PinPointer | — | Yes |
| Custom targets | — | Yes |
| Tempo Training | — | Yes |
| Virtual caddie | — | Yes |
| Full vector map | — | Yes |
| Handicap scoring | — | Yes |
| PlaysLike distance | — | Yes |
| Preloaded with 43,000 courses worldwide | — | Yes |
| Green Contours (with Garmin Golf membership) | — | 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 |
| Running Features | ||
| Run workouts | Yes | Yes |
| Running power | Yes | Yes |
| Race predictor | Yes | Yes |
| Foot pod capable | Yes | Yes |
| Running dynamics | Yes | Yes |
| Lactate threshold | yes (with compatible accessory) | yes (with compatible accessory) |
| Grade-adjusted pace | Yes | Yes |
| Trail run auto climb | Yes | Yes |
| Performance condition | Yes | Yes |
| Run/Walk/Stand detection | Yes | Yes |
| Stride length (real time) | Yes | Yes |
| PacePro™ Pacing Strategies | Yes | Yes |
| Vertical oscillation and ratio | Yes | Yes |
| Ground contact time and balance | Yes | Yes |
| GPS-based distance, time and pace | Yes | Yes |
| Cadence (provides real-time number of steps per minute) | Yes | Yes |
| Hill score | — | Yes |
| Course- and weather-specific race predictor | — | Yes |
| What You'll Love | ||
| Touchscreen | Yes | Yes |
| Display type | AMOLED | AMOLED |
| Water rating | Dive (100 meters) | Dive (200 meters) |
| Garmin Pay™ | Yes | Yes |
| Training status | Yes | yes (improved) |
| Training readiness | Yes | Yes |
| Pulse Ox blood oxygen | yes (spot-check, during sleep, all day) | Yes |
| Sleep score and insights | Yes | Yes |
| Battery life (smartwatch mode) | up to 10 days (4 days always-on) | Up to 10 days (4 days always-on) |
| Music storage | — | Yes |
| Multi-band GPS | — | Yes |
| Built-in mapping | — | Yes |
| Activity Profiles | ||
| Gym | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing, Indoor Rowing |
| Dive | Diving | — |
| Swim | Pool Swimming, Open Water Swimming | Pool Swimming, Open Water Swimming |
| Cycling | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX | Biking, Road Biking, Mountain Biking, Gravel Biking, Bike Commuting, Bike Touring, eBiking, eMountain Biking, Indoor Biking, Cyclocross, BMX |
| Wellness | Walking, Pilates, Yoga , Indoor Walking | Walking, Pilates, Yoga, Indoor Walking |
| Multisport | Swimming/Running, Triathlon | Swimming/Running, Triathlon |
| In the ring | Boxing, Mixed Martial Arts | Boxing, Mixed Martial Arts |
| Team sports | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball | Basketball, Volleyball, Field Hockey, Ice Hockey, Football/Soccer, American Football, Lacrosse, Rugby, Ultimate Disc, Cricket, Softball, Baseball |
| Motor sports | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling | Motorcycling, Overlanding, Motocrossing, ATVing, Snowmobiling |
| On the Water | Stand Up Paddleboarding, Rowing, Kayaking, Surfing, Kiteboarding, Windsurfing, Fishing, Boating, Water Skiing, Wakeboarding, Wakesurfing, Tubing, Snorkeling, Whitewater | 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 | Tennis, Pickleball, Badminton, Squash, Table Tennis, Padel, Platform Tennis, Racquetball |
| Snow & winter | Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, Backcountry Skiing, Ice Skating, Snowshoeing | Skiing, Snowboarding, Backcountry Snowboarding, XC Classic Skiing, Backcountry Skiing, Ice Skating, Snowshoeing |
| Indoor running | Treadmill Running, Indoor Track Running, Virtual Running | Treadmill Running, Indoor Track Running, Virtual Running |
| Outdoor running | Running, Outdoor Track Running, Trail Running, Obstacle Racing | Running, Outdoor Track Running, Trail Running, Ultra Running, Obstacle Racing |
| Outdoor recreation | Hiking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery | Hiking, Indoor Climbing, Bouldering, Climbing, Hunting, Horseback Riding, Golfing, Disc Golf, Archery |
| Other activity profiles | Tactical, Inline Skating | Jumpmaster, Tactical, Inline Skating |
| Swimming Features | ||
| Pool swim workouts | Yes | Yes |
| Time and distance alerts | Yes | Yes |
| Auto rest (pool swim only) | Yes | Yes |
| Drill logging (pool swim only) | Yes | Yes |
| Countdown start (pool swim only) | Yes | Yes |
| Underwater wrist-based heart rate | Yes | Yes |
| "Repeat on" rest timer (pool swim only) | Yes | Yes |
| Basic rest timer (up from 0) (pool swim only) | Yes | Yes |
| Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only) | Yes | Yes |
| Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories) | Yes | Yes |
| Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories) | Yes | 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) | yes (with HRM-Tri, HRM-Swim, HRM-Pro or HRM-Pro Plus) |
| Critical swim speed | — | Yes |
| Pacing alerts (pool swim only) | — | Yes |
| Tactical Features | ||
| XERO™ Locations | Yes | Yes |
| Dual grid coordinates | Yes | Yes |
| Kill switch | — | Yes |
| Stealth Mode | — | Yes |
| Ballistics solver | — | yes (unlock required) |
| Night vision mode | — | Yes |
| Outdoor Recreation | ||
| Tides | Yes | Yes |
| TracBack® | Yes | Yes |
| Sight 'N Go | Yes | Yes |
| Tide glance | Yes | Yes |
| Back to start | Yes | Yes |
| Fish forecast | Yes | Yes |
| UltraTrac mode | Yes | Yes |
| Vertical speed | Yes | Yes |
| GPS coordinates | Yes | Yes |
| Reference point | Yes | Yes |
| Area calculation | yes (via Connect IQ™) | yes (via Connect IQ™) |
| Elevation profile | Yes | Yes |
| Projected waypoint | Yes | Yes |
| Total ascent/descent | Yes | Yes |
| Future elevation plot | Yes | Yes |
| Distance to destination | Yes | Yes |
| Expedition GPS Activity | Yes | Yes |
| Sun and moon information | Yes | Yes |
| Point-to-point navigation | Yes | Yes |
| Rest Timer (Ultra Run only) | Yes | Yes |
| Bread crumb trail in real time | Yes | Yes |
| Barometric trend indicator with Storm Alert | Yes | Yes |
| Up Ahead | — | Yes |
| Auto rest | — | Yes |
| Explore Nearby | — | Yes |
| NextFork™ navigation | — | Yes |
| Preloaded ski resort maps | — | Yes |
| ClimbPro™ Ascent Planner | — | Yes |
| Preloaded road and trail maps | — | Yes |
| Downloadable cartography support | — | Yes |
| Daily Smart Features | ||
| Calendar | Yes | Yes |
| Connectivity | Bluetooth® Smart, ANT+® | BLUETOOTH®, ANT+®, Wi-Fi®, Subwave™ |
| Garmin Share | Yes | Yes |
| Find My Phone | Yes | Yes |
| Find My Watch | Yes | Yes |
| VIRB® Remote | Yes | Yes |
| Morning report | Yes | Yes |
| Red shift mode | Yes | Yes |
| Weather forecasts | Yes | Yes |
| Smart Notifications | Yes | Yes |
| Smart trainer control | Yes | Yes |
| Smartphone compatibility | iPhone®, Android™ | iPhone®, Android™ |
| Controls smartphone music | Yes | Yes |
| On-device Connect IQ™ Store | Yes | Yes |
| Find My Phone during GPS activity | Yes | Yes |
| Pairs with Garmin Connect™ Mobile | Yes | Yes |
| Compatible with Garmin Messenger app | Yes | Yes |
| Battery saver (customizable low power watch) | Yes | Yes |
| Realtime settings sync with Garmin Connect™ mobile | Yes | Yes |
| View images from notifications on watch (Android™ only) | Yes | Yes |
| Text response/reject phone call with text (Android™ only) | Yes | Yes |
| Connect IQ™ (downloadable watch faces, data fields and apps) | Yes | Yes |
| Stocks | — | Yes |
| Plays and controls watch music | — | Yes |
| Activity Tracking Features | ||
| TrueUp™ | Yes | Yes |
| Move IQ™ | Yes | Yes |
| Step counter | Yes | Yes |
| Floors climbed | Yes | Yes |
| Calories burned | Yes | Yes |
| Distance traveled | Yes | Yes |
| Intensity minutes | Yes | Yes |
| Automatic rep counting | Yes | Yes |
| Garmin Connect™ Challenges app | yes (optional Connect IQ app) | yes (optional Connect IQ app) |
| Move alerts (displays on device after a period of inactivity) | Yes | Yes |
| Auto goal (learns your activity level and assigns a daily step goal) | Yes | Yes |
| Workout and Training Plans | ||
| HIIT workouts | Yes | Yes |
| Yoga workouts | Yes | Yes |
| Cardio workouts | Yes | Yes |
| Pilates workouts | Yes | Yes |
| Strength workouts | Yes | Yes |
| Garmin Cycling Coach | Yes | Yes |
| Garmin Running Coach | Yes | Yes |
| Garmin Running Coach Experts | Yes | Yes |
| On-screen workout animations | Yes | Yes |
| On-screen workout muscle maps | Yes | Yes |
| Daily Suggested Workout - Cycling | Yes | Yes |
| Daily Suggested Workout - Running | Yes | Yes |
| Daily Suggested Workout - Walking | Yes | — |
| Garmin Coach - Prebuilt Cycling Plans | Yes | Yes |
| Health & Wellness Monitoring | ||
| Sleep | Yes | yes (advanced) |
| Hydration | yes (in Garmin Connect™) | yes (in Garmin Connect™) |
| Breathwork | Yes | Yes |
| Fitness age | Yes | yes (in app) |
| Sleep coach | Yes | — |
| Nap detection | Yes | Yes |
| All-day stress | Yes | Yes |
| Women's health | yes (in Garmin Connect™) | yes (in Garmin Connect™) |
| Health snapshot | Yes | Yes |
| Respiration rate | Yes | Yes |
| Resting heart rate | Yes | Yes |
| Relaxation reminders | Yes | — |
| Abnormal heart rate alerts | yes (high and low) | yes (high and low) |
| Relaxation breathing timer | Yes | Yes |
| Body Battery™ energy monitor | Yes | Yes |
| Wrist-based heart rate (constant, every second) | Yes | Yes |
| Jet lag adviser | — | Yes |
| Skin temperature | — | Yes |
| Safety and Tracking Features | ||
| Assistance | Yes | Yes |
| Live Event Sharing | Yes | Yes |
| Incident Detection during select activities | Yes | Yes |
| Incident detection alert on phone for wearables | Yes | Yes |
| Kid Activity Tracking Features | ||
| Toe-to-Toe™ Challenges app | yes (optional Connect IQ Toe-to-Toe™ Challenges app) | yes (optional Connect IQ Toe-to-Toe™ Challenges app) |
| Training, Planning and Analysis Features | ||
| % HRR | Yes | Yes |
| % HR max | Yes | Yes |
| HR zones | Yes | Yes |
| HR alerts | Yes | Yes |
| Shortcuts | Yes | Yes |
| HRV status | Yes | Yes |
| Manual lap | Yes | Yes |
| Auto max HR | Yes | Yes |
| Auto scroll | Yes | Yes |
| Finish time | Yes | Yes |
| HR calories | Yes | Yes |
| Voice alerts | Yes | Yes |
| Custom alerts | Yes | Yes |
| Physio TrueUp | Yes | Yes |
| Recovery time | Yes | Yes |
| Training load | Yes | Yes |
| VO2 Max (Run) | Yes | Yes |
| Course guidance | Yes | Yes |
| Training effect | Yes | Yes |
| Virtual Partner | Yes | Yes |
| Race an Activity | Yes | Yes |
| Advanced workouts | Yes | Yes |
| Interval training | Yes | Yes |
| Race glance/widget | Yes | Yes |
| VO2 Max (Trail Run) | Yes | Yes |
| GPS speed and distance | Yes | Yes |
| Configurable lap alerts | Yes | Yes |
| Customizable data pages | Yes | Yes |
| Unified training status | Yes | Yes |
| Touch and/or button lock | Yes | Yes |
| Activity history on watch | Yes | Yes |
| Downloadable training plans | Yes | Yes |
| Training effect (anaerobic) | Yes | Yes |
| Manual multisport activities | Yes | Yes |
| HRM running pace and distance | Yes | Yes |
| Heat and altitude acclimation | Yes | Yes |
| Customizable activity profiles | Yes | Yes |
| Auto Pause® automatic timer halt | Yes | Yes |
| Respiration rate (during exercise) | yes (with compatible accessory) | yes (with compatible accessory) |
| Auto Lap® interval tracking feature | Yes | Yes |
| Primary benefit (Training Effect labels) | Yes | Yes |
| Power Modes - customizable in-activity battery settings | Yes | Yes |
| HR broadcast (broadcasts HR data over ANT+® to paired devices) | Yes | Yes |
| Improved interval (includes open repeats, intervals data page, rest screen and auto detection) | Yes | Yes |
| Load ratio | — | Yes |
| Rest timer | — | Yes |
| Endurance score | — | Yes |
| Realtime stamina | — | Yes |
| Training load focus | — | Yes |
| Garmin Live Segments | — | Yes |
| Strava Live Segments | — | Yes |
| Improved recovery time | — | Yes |
| Trendline™ Popularity Routing | — | Yes |
| Round-trip course creator (running/cycling) | — | 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) |
| Boating Features | ||
| Anchor Alarm | — | Yes |
| Countdown timer | — | Yes |
| Tack assist mode | — | Yes |
| Autopilot Control | — | Yes |
| Boat Data Streaming | — | CIQ |
| Virtual starting line | — | Yes |
| Available Boating Profiles | — | Boating, Sailing, Sail Racing |
| Wearable trolling motor remote | — | Yes |
| Built-in barometer and tide tables | — | yes (downloadable tides) |
Wrist Fit
Garmin Descent™ G2
Sits best on wrists ~48–65mm wide (≈ 12.8–17.4cm circumference).
Garmin Descent™ Mk3i – 43 mm
Sits best on wrists ~45–61mm wide (≈ 12.0–16.3cm circumference).
Frequently Asked Questions
Is the Garmin Descent™ G2 bigger than the Garmin Descent™ Mk3i – 43 mm?
The Garmin Descent™ G2 is bigger — 45.5mm vs 43mm case width.
Which fits a smaller wrist better, the Garmin Descent™ G2 or the Garmin Descent™ Mk3i – 43 mm?
The Garmin Descent™ G2 suits wrists around 48–65mm wide, and the Garmin Descent™ Mk3i – 43 mm around 45–61mm. The one with the smaller lower bound is the safer pick for a small wrist.
Can I see the Garmin Descent™ G2 and Garmin Descent™ Mk3i – 43 mm 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.