smart heart rate band

Specifications
The newest version of mi band is released on June 2nd! Mi Band 2, an updated heart rate wristband with 0.42" OLED display screen and Touch Button operating mode - Mi Band 2 is equipped with a ADI photoelectric heart rate sensor, can real-time detect heart rate, let you adjust the motion state scientifically and consume fat efficiently. Mi Band 2 manages your motion every moment and takes good care of you. Beautiful OLED display and Touch Button operating mode give you more convenient control experience.

1. 100% original Xiaomi mi band 2 
2 .0.42inch OLED display screen with touchpad 
3. Support Heart rate monitor 
4. Passometer,Fitness Tracker,Sleep Tracker,Message Reminder,Call Reminder 
5. Water resistant (IP67) 
6. 20-day standby power 
7. Sleep-cycle smart alarm
8. With a Dialog II 4.0 bluetooth chip, ADI sensor
9. Running MIUI Android 4.4 and above versions; For iphone 4s/5/5s/6/plus ios 7.0 and above
10.Unlock your Mi phone without a password
11. Stylish band options (incl. wrap-around and leather)
12. Wrist Strap Length 235mm Adjustable Wrist Strap Length 155mm ~ 210mm

Compatible Minimum Requirements:
1.Requires Bluetooth 4.0.
2.Compatible with any device with Android 4.4 and above.
3.Compatible with iPhone models 4s and above that run on iOS 7.0 and above. 
For IOS devices : iPhone 4s / 5 / 5c / 5s / 6 / 6 Plus / 6s 6s plus

For smart unlock features:
Note: Mi Band's phone unlocking feature requires smartphones with MIUI or Android 5.0 and above.

Colors :
Black
Blue
Green
Pink