MANUFACTURER Xiaomi MODEL Mi Band 4 TYPE Smart Watch WATERPROOF RATING 5ATM SCREEN TYPE AMOLED SCREEN SIZE 0.95″ SCREEN RESOLUTION 120×240 RGB SCREEN COLOR NUMBER 24bit SCREEN BACK LIGHT WITH maximum brightness ≥400nit, adjustable brightness TOUCH SCREEN On Cell double point mutual capacitance COVER MATERIAL 2.5D tempered glass + AF coating PRESS 1 touch button (wake up, return) WRISTBAND TYPE 5ATM WRIST STRAP WIDTH 18mm WRISTBAND MATERIAL TPU WRIST STRAP ADJUSTABLE LENGTH 155-216mm MEMORY 512KB FLASH 16MB CONNECT Bluetooth 5.0 BLE CHARGING METHOD 2Pin Pogo Pin CHARGING TIME ≤ 2 hours VIBRATION MOTOR Rotor motor APP Xiaomi Sport APP