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: BT5.0 BLE
Battery: LiPo, 135mAh
Charging Type: 2Pin Pogo Pin
Charging time: ≤ 2 hours
Standby time: Up to 20 days
Motor Type: Rotor
Body material: Polycarbonate
App: Mi Fit
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
Even more features: 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
Package contents: Mi Smart Band 4 X 1, Wrist strap X 1, Specialised charging cable X 1, User guide X 1
