Xiaomi Mi Band 4 AMOLED Color Screen Wristband BT5.0 Fitness Tracker Smart Wristbands (Black);

Specification: Type: Mi Band 4 Screen Size: 0.95" Wrist Strap Material: Thermoplastic polyurethane Adjustable Wrist Strap Length: 155-216mm Wristband Width: 18mm Water Resistance Rating: 5 ATM Display Type: AMOLED Resolution: 120 x 240 RGB Colour Depth: 24bit Screen Brightness: Up to 400 nits (max brightness), brightness adjustable Touchscreen Type: On-cell capacitive touchscreen Button: Single Touch Button (wake up, go back) Wrist Strap Type: Removable wrist strap 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 Tequirements: Android 4.4, iOS 9.0 or above