The Xiaomi Mi Band 2 is a low cost, wearable activity tracker produced by Xiaomi. It was released on 7 June 2016. Unlike its predecessor, the Xiaomi Mi Band 2 comes with an OLED screen and a capacitive button. In September of 2017, Xiaomi released an ultra low-cost version of the Mi Band 2, titled "Mi Band - HRX Edition"
On 31 May 2018, Xiaomi released the Mi Band 3, the successor to the Mi Band 2.
Specifications
General
Brand: Xiaomi
Bluetooth version: V4.0 BLE (Chinese version), V4.2 BLE (International version) Waterproof Rating: IP67 Color: Black Compatibility: Android 4.4 + / iOS 7.0 + Language: English / Chinese / Multilanguage Total length: 235 mm Adjustable length: 155–210 mm Product size (L x W x H): 40.3 x 15.7 x 10.5 mm Product weight: 7.0 g
Sensors
Accelerometer
Optical Heart Rate Monitor
Vibration Engine
Display
Display: 0.42 inch OLED
Button: Capacitive
Battery
Battery type: Lithium Polymer battery
Battery capacity: 70 mAh
Battery Life: 10-30 days
Input current: 45 mA (TYP), 65 mA (MAX) Input voltage: DC 5V