Brand Name
Xiaomi 
Model
Miband 2
Color
Black 
Net Weight
7g
Meterials
Plastic, aluminum
waterproof
IP67
Internal configuration
Screen 0.42 inches OLED display Dialog
Dialog 2 Bluetooth 4.0 BLE
ADI ultra-low power acceleration sensors + Optical heart rate sensor
Battery
70mAh
standby time:20 days type batteries
Input Current:45mA (TYP), 65mA (MAX)
Input voltage:5V
Compatible Minimum Requirements
Android 4.4 + & support Bluetooth 4.0 : For Android devices;
iOS 7 - For Apple 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
Phone with Android version 5.0 above
Wristband
Wrist Strap length:235 mm
Adjustable Wrist Strap Length: 155mm ~ 210mm 
material:Thermoplastic elastomers, aluminum
Package Contents
1*Original Xiaomi Mi band 2 Smartband
1*Original strap
1*charger 
1*Manual
 
Features:
0.42inch OLED display screen with touchpad    
Support Heart rate  monitor    
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)