Technical Specifications

Weight: 22.1g

Water Resistance Rating: 5 ATM

Display Type: AMOLED

Screen Size: 0.95″

Resolution: 120 x 240 RGB

Colour Depth: 24bit

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

RAM: 512KB

ROM: 16MB

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

Wireless connectivity: Bluetooth 5.0 BLE

Battery: LiPo, 135mAh

Charging Type: 2 Pin Pogo Pin

Charging time: ≤ 2 hours

Standby time: Up to 20 days

Motor Type: Rotor

Body material: Polycarbonate

System requirements: Android 4.4, iOS 9.0 or above

Sport Functions

6 workout modes: Treadmill, exercise, outdoor running, cycling, walking, pool swimming. Count steps, distance, and calories burned

Health monitoring

Workout completion notifications, goal setting, sleep monitoring, heart rate monitoring, all-day heart rate checking, resting heart rate, heart rate chart, idle alerts.

Other features

Alarm, proximity sensor, pre-set watch face, customizable watch face, lock screen, timer, stopwatch, phone alarm and notifications, incoming calls, message notifications, calendar notifications, app notifications, weather forecast, Find my phone, phone unlock, event notification, Night mode, Do not disturb mode (works even without phone), music controls on band, Bluetooth broadcasting, battery level display, different ways to wear, OTA updates.