100% Original Xiaomi Mi Band Smart Xiaomi Miband Bracelet for Xiaomi MI4 M3 MIUI Smart Fitness Wearable Tracker Waterproof

Specification

Mi Band, a fitness tracking wrist band that monitors your fitness and tracks your movement (walking or running)  plus your sleeping pattern and  use it as a smart vibrating alarm to wake up feeling better.  Featuring the industry's most power-efficient bluetooth chip and accelerometer, a single charge on this waterproof device will last up to 30 days. Better yet,  the band doubles as a security token that automatically unlocks your phone. The technical gubbins all live inside a small alloy body with LED notification lights. This alloy device can be slipped in and out of different colour rubber wrist straps to suit your style, and there were even some more smart concepts shown too including a leather option.

Main Features : 

* 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) 

Details : 

* Input Voltage : DC 5.0V
* Battery Capacity : 41mAh
* Cell Type : Lithium Polymer
* Input Current : 25mAh (TYP)
* Alloy Body Dimension : 36*14*9 mm
* Alloy Body Shell Material : Polycarbonate
* Wrist Strap Material : DowCorning TPSiV
* Metal Face Material : Magnesium Aluminum Alloy
* LED Notification Light : Blue, Green, Red, Orange
* Adjustable Wrist Strap Length : 157mm ~ 205mm
* Compatible with Xiaomi Mi4 / Mi3 featuring Bluetooth 4.0