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Features:

Water Resistance Rating: 5 ATM

Display: AMOLED, 0.95"

Resolution: 120 x 240 RGB, 24bit Colour Depth

Screen Brightness: Up to 400 nits (max brightness), brightness adjustable

Touchscreen type: On-cell capacitive touchscreen

Screen protection: 2.5D tempered glass with anti-fingerprint coating

Button: Single touch button (wake up, go back)

Wrist strap type: Removable wrist strap (Mi Smart Band 4 is compatible with Mi Band 3 straps)

Wristband width: 18mm

Wrist strap material: Thermoplastic polyurethane

Adjustable wrist strap length: 155-216mm

Wireless connectivity: BT5.0 BLE

RAM/ROM: 512KB/16MB

Sensors: 3-axis accelerometer 3-axis gyroscope, PPG heart rate sensor Capacitive proximity sensor

Battery: LiPo, 135mAh

Standby time Up to 20 days

Charging: 2Pin Pogo Pin, time≤ 2 hours

Body material: Polycarbonate

Motor Type: Rotor

App: Mi Fit

System requirements: Android 4.4, iOS 9.0 or above

Mi Band 4