English instruction and Q&A manual help you use the device.
Heart rate monitor: Miband 2 with ADI accelerometer and optical heart rate sensor
0.42" OLED display screen with touch button control. IP67 Waterproof and dust-proof Design, 20-day Battery
Support Bluetooth 4.0 Android 4.4 or iOS 7.0 and above smart phones
Sync with the app to analyze your fitness and sleep activities to help you improve your lifestyle