Xiaomi Mi Band 4
- 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
- Water Resistance Rating: 5 ATM
- Display Type: AMOLED
- Screen Size: 0.95″
- Resolution: 120 x 240 RGB
- Color 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
- Motor Type: Rotor
- Body material: Polycarbonate
- App: Mi-Fit
- System requirements: Android 4.4, iOS 9.0 or above
