Battery capacity:70mAh
Standby time:20 days
Battery type: Lithium polymer
Input current: 45 mA (typ) 65mA (max)
Weight 7.0g
Sensor material Plastic, aluminum alloy
Water-resistance IP67

Compatible phones:
Devices with Android 4.4 and above, such as Mi 3, Mi 4, Mi 4i, Mi 5, Mi Max, Redmi Note 4G, Redmi Note Prime,
Redmi 1S, Redmi 2, Redmi 2 Prime, Redmi Note 3, Redmi 3S, Redmi 3S Prime, Redmi 3S+

Devices with iOS 7.0 and above, such as iPhone models 4s and later.
Note: Mi Band's phone unlocking feature requires smartphones with MIUI or Android 5.0 and above.