Display 1.62-inch AMOLED Touch Display Resolution: 192 x 490 pixels Brightness: Up to 1200 nits, adjustable Charging time: Approx. 1 hour Typical usage time: Up to 21 days Nominal Capacity: 233mAh Specifications 5ATM water resistant App: Mi Fitness Motor: Linear motor Compatibility: Supports smartphones with Android 8.0 or iOS 12.0 and above