Features

0.42inch OLED display screen with touchpad to deliver smooth operation and power-saving application experience.
IP67 water resistance to survive harsh outdoor environment effortlessly, suitable for sports.
Bluetooth 4.0 to provide stable and fast connection with wide range of mainstream devices.
Heart rate monitoring function to make an accurate analysis by optical heart rate sensor.
Support sleeping monitoring, sedentary reminder, pedometer,call reminder, message reminder and sleep-cycle smart alarm.
Smart unlock via Android phones without a password need, fast and simple to save time.
Simple and convenient awakening time display by lifting wrist, pratical to use.
Anti-lost wristband design to reduce risks of lossing, considerate for users' concern.
Supporting running MIUI Android 4.4 and above versions; For iPhone 4s/5/5s/6/plus iOS 7.0 and above.
Optimized UI interface to provide neat, convenient and smooth application experience.

Compatible Minimum Requirements:
Bluetooth 4.0 required.
Compatible with Mi 3, Redmi Note 4G, or any device with Android 4.4 and above.
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:
Xiaomi (MIUI 6 and above): Mi2/2S/2A, Mi3, Mi4, Mi Note, Mi4C, Redmi 1S, Redmi 2/2A, Redmi Note, Redmi Note2  Note3,
Xiaomi MI5 4S   XIAOMI MAX
Note: Mi Band's phone unlocking feature requires smartphones with MIUI or Android 5.0 and above.

In the Box:
1 x Smart Wristband
1 x Charging Cable
1 x User Manual
1 x Warranty Card