Specifications:

100% Original Mi band 2
0.42inch OLED display screen with touchpad
Support Heart rate monito
Gesture Wake up Screen
Passometer,Fitness Tracker,Sleep Tracker,Message Reminder,Call Reminder
Water resistant (IP67)
20-day standby power
Sleep-cycle smart alarm
With a Dialog II 4.0 bluetooth chip, ADI sensor
Running MIUI Android 4.4 and above versions; For iphone 4s/5/5s/6/plus ios 7.0 and above
Unlock your Mi phone without a password
Stylish band options (incl. wrap-around and leather)

Devices requirements

Bluetooth 4.0 Android 4.4 or iOS >= 7.0 phones

(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
Original Xiaomi mi Band

The Xiaomi bracelet has function of record the sport date in every day, sleep quality monitoring, smart alarm clock wake up.

You can view real-time physical activity through mobile applications, monitoring the effect of walking and running, you can identify more sport through the clouds.

Xiaomi bracelet can automatically determine whether to sleep, deep sleep and light were recorded and summarized sleep time to help users monitor their sleep quality.

it can connect with your android 4.4 mobile phone(support connect the system with android 4.4 or more high), the Battery can support 30 days.

Original Xiaomi mi Band

Specifications:
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
Weight: 5.0g
Color: black
Compatible with Xiaomi Mi4 / Redmi Note 4G LTE/ Xiaomi Mi3 featuring Bluetooth 4.0 & Android iOS devices with Bluetooth 4.0 or above
App name: Mi Fit; directly search and download at Play Store or Apple Store