Weight22.1g

Water Resistance Rating5 ATM

Display TypeAMOLED

Screen Size0.95"

Resolution120 x 240 RGB

Colour Depth24bit

Screen BrightnessUp to 400 nits (max brightness), brightness adjustable

Touchscreen typeOn-cell capacitive touchscreen

Screen protection2.5D tempered glass with anti-fingerprint coating

ButtonSingle touch button (wake up, go back)

Wrist strap typeRemovable wrist strap
(Mi Smart Band 4 is compatible with Mi Band 3 straps)

Wristband width18mm

Wrist strap materialThermoplastic polyurethane

Adjustable wrist strap length155-216mm

RAM512KB

ROM16MB

Sensors3-axis accelerometer + 3-axis gyroscope;
PPG heart rate sensor;
Capacitive proximity sensor

Wireless connectivityBT5.0 BLE

BatteryLiPo, 135mAh

Charging Type2Pin Pogo Pin

Charging time≤ 2 hours

Standby timeUp to 20 days

Motor TypeRotor

Body materialPolycarbonate

AppMi Fit

System requirementsAndroid 4.4, iOS 9.0 or above