Features:
* OLED display 0.78" touch
* Bluetooth 4.1
* Rechargeable battery 110mAh
* The battery life: 20 days standby
* Certification IP68
* Supported systems: Android, iOS

Functions:
* Watch
* Alarm
* Step counter
* Measurement of heart rate
* Measurement of sleep quality
* Text notifications
* Notification by vibration
* Notification of a sedentary lifestyle
* Notifications about calls, SMS, apps, and
* Download the Mi Fit app for Android and iOS

Dimensions:
* Core: 3.20 x 1.79 x 1.20 cm
* Strap: 24.7 cm