Dimension:41.3 mm × 41.3 mm × 9.8 mm Wrist Size:120-190 mm Weight:Approximately 37 g (strap excluded) Display: Size: 1.32 inches AMOLED color screen Microphone:Supporte Speaker : supported Material:Stainless steel Watch Strap: Black Fluoroelastomer Strap Silver Stainless Steel Strap White Leather Strap Sensors:Accelerometer sensor,Gyroscope sensor,Magnetometer sensor,Optical heart rate sensor,Barometer sensor,Temperature sensor Button:ome Button (Rotating Crown) and Side Button Charging port:Wireless charging Connectivity :NFCSupported Bluetooth: 2.4 GHz, supports BT5.2 and BR + BLE Battery Life: 7-day battery life for maximum usage 4-day battery life for regular usage 2-day battery life with Always On Display enabled