Battery sold international,a battery of your life!
<br />Feature:
<br />1. Stylish band options
<br />2. 0.42inch OLED display screen with touchpad
<br />3. Support Heart rate  monitor
<br />4. Passometer,Fitness Tracker,Sleep Tracker,Message Reminder,Call Reminder
<br />5. Sleep-cycle smart alarm
<br />6. Running MIUI for Android 4.4 and above versions; For iphone 4s/5/5s/6/plus ios 7.0 and above
<br />7.Unlock your Mi phone without a password
<br />8.20-day standby power
<br />
<br />Description:
<br />You can work out customized schedule to improve fitness effect via app 
<br />Low power consumption OLED display
<br />Power-efficient ADI accelerometer,optical heart rate sensor
<br />Resistant to scratches and fingerprints
<br />Anodized 0.05mm ultra-thin button
<br />Bluetooth 4.0 for faster,stable connections
<br />Xiaomi Band2 Resistant to water,dust,sweat. 
<br />0.41 inches OLED display
<br />Bluetooth 4.0 BLE
<br />Low power consumption acceleration sensor and photoelectric heart rate sensor
<br />
<br />Compatible Minimum Requirements:
<br />1.Requires Bluetooth 4.0.
<br />2.Compatible with Mi 3, Redmi Note 4G, or any device with for Android 5.0 and above.
<br />3.Compatible with for iPhone models 4s and above that run on for iOS 8.0 and above.
<br />   For IOS devices : for iPhone 4s / 5 / 5c / 5s / 6 / 6 Plus/6s/6s plus
<br />
<br />For smart unlock features:
<br />1.Xiaomi (MIUI 6 and above): Mi2/2S/2A, Mi3, Mi4, Mi Note, Mi4C, Redmi 1S, Redmi 2/2A, Redmi Note, Redmi Note2  Note3,
<br />  xiaomi MI5 4S   XIAOMI MAX
<br />2. Mi Band's phone unlocking feature requires smartphones with MIUI or for Android 5.0 and above.
<br />When the Xiaomi Mi Band is fully charged, the standby time is approximately 20 days. Each open will consume power, the more the number of open, the shorter the standby time. In particular, the test heart rate, it will consume more power. 
<br />Product work standby time will be subject to changes in the use of.
<br />Reference time: 7 days
<br />
<br />Specifications:
<br />Brand: Xiaomi
<br />Model: Xiaomi Band 2 Smart Wristband
<br />Material: plastic, aluminum
<br />Color: Black
<br />Size: 40.3*15.7*10.5mm/1.59*0.62*0.41 inch
<br />Strap: total length: 235 mm
<br />Adjustable Length: 155-210 mm
<br />Battery Capacity: 70mAh
<br />Standby time: 20 days
<br />Batteries Type: Lithium Polymer
<br />Input current: 45 mA (TYP) 65 mA (MAX)
<br />Waterproof rating: IP67
<br />
<br />Package Included:
<br />1 x Xiaomi Band 2 Smart Wristband
<br />1 x Cable
<br />1 x Manual
<br />Purchasing here,fulfill your dream!