For Xiaomi Mi Bluetooth 4.0v Band Smart Bracelet, Rasse IP67 Waterproof Wearable Tracker Wristband Smart Bracelet + ONE Replacement Wrist Band for Xiaomi MI4 M3 Red2 Xiaomi note MIUI IOS7.0 above iphone 6 6 plus iPhone 4s 5 5s Smart Fitness (black)

Water resistant (IP67)
* 30-day standby power
* Sleep-cycle smart alarm
* Fitness monitor & sleep tracker
* Running MIUI Android 4.4 and above
* Unlock your Mi phone without a password
* Stylish band options (incl. wrap-around and leather)