600 nits (peak) AMOLED display type Dimensions: 1.97 inches 450 x 390 pixels with a density of about 302 pixels per inch Constantly visible Construct an aluminum frame and plastic back. Waterproof (5ATM) 50m water-resistant HyperOS PLATFORM OS SOUND Yes, a loudspeaker GLONASS, GALILEO, BDS, QZSS, LE Positioning GPS, Bluetooth 5.3, A2DP, GFC Yes FEATURES: compass, gyro, accelerometer, heart rate, and SpO2 battery Li-Po 470 mAh non-detachable type