Xiaomi Mi band 3 Smart Wristband With OLED Display Heart Rate Monitor Black (Global)

Model    Mi Band 3
Water-Proof    5ATM
Color    Black
Display    Screen: 0.78 inch OLED Touch Display 
Resolution: 128 x 80
Touch key: Yes
Compatibility    V4.0 or above, Android 4.4 / iOS 9.0 or above
Bluetooth    V4.2 BLE
Function    Health tracker: Measurement of heart rate,Sleep management,Pedometer,Calories burned measuring,Steps counting,Distance recording,Sedentary reminder
Other functions: Unlock phone without password,Call/APP message reminder,Time,Alarm Clock
Alert type: Vibration
Sensors: ADI ultra low-power acceleration sensor + photoelectric heart rate sensor
Battery capacity and life    110mAh Lithium polymer battery 
Standby time: About 20 days
Material    Mi-core material: Plastic + Alloy
Case material: TPEE
Band material: TPSiV
Weight and Size    Band total length: 247 mm
     Adjustable length: 155-216 mm
     Product size (L x W x H): 46.9 x 17.9 x 12 mm
     Product weight With Strap: 20g
Package    1 x Mi Band 3
     1 x Charger