41 mm (1.32 inches) in size Resolution of the display: 466 x 466 pixels Type of connection: NFC, Bluetooth 5.2 OS: iOS 13.0 or later, Android 8.0 or later Side control button and main control button (rotating crown) Integrated microphone and speaker Resistance to water: up to 50 m Size of Wrist: 120-190 mm The strap Material: Fluorelastomer, Gold Milano, Leather, and Stainless Steel Composition: Stainless Steel Battery life: up to seven days of moderate use Wireless charging The measurements are 41.3 x 41.3 x 9.8 mm. Weight (without strap): 37 g