Haylou · 2021
LS02 Pro Size, Dimensions & Wrist Fit
Case Width
37.7mm
Thickness
10.83mm
Lug-to-Lug
48mm
Weight
51.4g
The LS02 Pro looks in proportion on wrists of 15 cm (5.9 in) and up round, and fills the wrist at 15.5–17.5 cm (48mm lug to lug).
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Does the LS02 Pro fit your wrist?
| Wrist round (mm left each side) | 37.7mm |
|---|---|
| 14 cm / 5.5 in | Overhangs (1.4mm over) |
| 15 cm / 5.9 in | Bold (0.2mm) |
| 16 cm / 6.3 in | Sweet spot (1.8mm) |
| 17 cm / 6.7 in | Sweet spot (3.4mm) |
| 18 cm / 7.1 in | Balanced (5mm) |
| 19 cm / 7.5 in | Balanced (6.6mm) |
| 20 cm / 7.9 in | Balanced (8.3mm) |
The LS02 Pro in short
- Rated for 20 days of use per charge.
- Water resistant; no depth rating published.
- 51.4g on the wrist.
- 1.85 inches LCD display.
- Takes 22mm bands, so third-party straps fit without an adapter.
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Size, fit and battery side by side, against any smartwatch we list.
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LS02 Pro battery life
Published runtime
- Battery life20 days
Where it ranks among Haylou watches
- Everyday use20 days#1 of 10
- Capacity250 mAh#5 of 10
Top three in the Haylou range for everyday (smartwatch) use.
See all 10 Haylou watches ranked by battery lifeSettings to change and the 24-hour idle test are on the battery check.
2D Dimension Schematics
- Haylou LS02 Pro 37.7mm × 48mm · 10.8mm thick
3D preview
Haylou LS02 Pro on a wrist
What size band does the LS02 Pro take?
Lug width
22mm
Alternatives to the LS02 Pro
LS02 Pro specifications
- Battery life
- 20 days
- Display
- 1.85 inches
- Resolution
- 240 x 284 px
- Water rating
- Water resistant
- Strap
- 22 mm
Show all specificationsHaylou's published specification, for reference · checked September 2026
Design
- width
- 37.7
- height
- 48
- volume
- 19.6 cm³
- weight
- 51.4 g
- thickness
- 10.83
- resolution
- 240 x 284 px
- screen size
- 1.85 inches
- Display type
- LCD
- Has a display
- Yes
- pixel density
- 200 ppi
- width of band
- 22 mm
- water resistance
- Water resistant
- Always-On Display
- No
- has a touch screen
- Yes
- is designed for kids
- No
- Watch band is replaceable
- Yes
- Has sapphire glass display
- No
- maximum operating temperature
- 60 °C
- Ingress Protection (IP) rating
- IP68
- has branded damage-resistant glass
- No
- lowest potential operating temperature
- -10 °C
Battery
- battery life
- 20 days
- battery power
- 250 mAh
- has wireless charging
- No
- has a removable battery
- No
- Has a solar power battery
- No
- has a rechargeable battery
- Yes
Sensors
- has GPS
- No
- has a compass
- No
- Has a barometer
- No
- has a gyroscope
- No
- Has a cadence sensor
- No
- has an accelerometer
- Yes
- Monitors perspiration
- No
- Has a heart rate monitor
- Yes
- Has a temperature sensor
- No
- Monitors blood oxygenation levels
- Yes
Features
- release date
- 2021-10-22
- Has a stopwatch
- Yes
- Has smart alarm
- No
- Has call control
- Yes
- Has silent alarm
- Yes
- Has notifications
- Yes
- Has ECG technology
- No
- Locates your phone
- Yes
- has a front camera
- No
- has fall detection
- No
- has voice commands
- No
- Acquires GPS faster
- No
- Has vibrating alerts
- Yes
- number of microphones
- 1
- Can be used to answer calls
- No
- has irregular heart rate warnings
- No
- Has a built-in camera remote control function
- No
Connectivity
- has NFC
- No
- supports ANT+
- No
- supports Wi-Fi
- No
- supports Galileo
- No
- Bluetooth version
- 5
- has a cellular module
- No
- Is compatible with iOS
- Yes
- Is compatible with Android
- Yes
Miscellaneous
- has aptX
- No
- Has passcode
- No
- maximum Bluetooth range
- 10 m
- Is compatible with Windows
- No
- Is compatible with Mac OS X
- No
- has an external memory slot
- No
- has a battery level indicator
- Yes
- has a socket for a 3.5 mm audio jack
- No
App & Software
- Free app
- Yes
- Has coaching
- No
- Supports routes
- No
- Has achievements
- Yes
- Has goal setting
- Yes
- Has exercise diary
- Yes
- Predicts ovulation
- Yes
- Has weight tracking
- Yes
- Predicts start date
- Yes
- Tracks water intake
- Yes
- Has inactivity alerts
- No
- Has period notifications
- Yes
- Has temperature tracking
- No
- Doesn’t require account
- No
- Provides activity reports
- Yes
- Displays fertile window notifications
- Yes
- Counts how many calories you've burned
- Yes
Activity tracking
- Measures pace
- No
- Tracks distance
- No
- Tracks elevation
- No
- Designed for golf
- No
- Tracks your sleep
- Yes
- Tracks steps taken
- Yes
- Designed for diving
- No
- Has a route tracker
- No
- Has exercise tagging
- No
- Has multi-sport mode
- No
- Tracks calorie intake
- Yes
- Provides sleep reports
- Yes
- Detects activities automatically
- Yes
- Has a stroke counter for swimming
- No
