Specifications:

Display Size:
1.74” AMOLED

Display Resolution:
336 x 480, 1200nits
Autobrightness adjustment

Material:
2.5D reinforced glass screen
Aluminum alloy frame and high-strength fiber polymer
TPU strap

Water/Dust Resistance:
5ATM

Battery:
350mAh
21 days for normal use
<75mins charging

Connection:
Bluetooth 5.4

App:
Xiaomi Fitness

Dimension:
43.27 × 32.49 × 10.8 mm, 24.5g 

Compatibility:
Android 8, IOS 12 and above

Function:
135–205mm wrist circumeference
150 Sports mode
10 built-in running courses
Advanced sleep tracking
Upgraded AFE chip - more accurate measurement of heart rate and blood oxygen levels
All-day heart rate /  blood oxygen saturation / stress monitoring
Women's health management
Independent GNSS - five-satellite positioning