Specifications:

 

Display Size:
1.47" TFT

Display Resolution:
172 x 320 pixels, 247 PPI

Material:
Reinforced glass cover, 
TPU Strap

Water/Dust Resistance:
5ATM

Battery:
300mAh
Up to 18 days normal use
<2hrs charging

Connection:
Bluetooth 5.3

App:
Xiaomi Fitness

Dimension:
45.9 x 26.94 x 9.99mm, 16.5g

Compatibility:
Android 8, IOS 12 and above

Function:
135–215mm strap adjustable length
100 band faces
50 fitness modes
Heart rate monitoring
SpO₂ tracking
Sleep tracking
Women's health management
Stress measurement