1.32 inch AMOLED Colour Screen 42.3 mm x 42.3 mm x 10.2 mm Watch Strap: Black Fluoroelastomer Strap Watch Case: Color: Black Material: Front case: Stainless steel; Rear case: Plastic OS: Support HarmonyOS 2 or later | Android 6.0 or later | iOS 9.0 or later Battery: 7 days for typical use Connectivity: GPS Supported; Bluetooth: Supported Sensors: Accelerometer sensor, Gyroscope sensor, Geomagnetic sensor, Optical heart rate sensor, Air pressure sensor, Temperature sensor Button: Power button + function button, upper button supports the rotatable crown Water Resistant: 5ATM water-resistant