Tech specs

Screen 1.57in 394x324 OLED (40mm); 1.78in 448x368 OLED (44mm) Processor Apple S6 Storage 32GB

OS watchos 7 Battery life Up to 18hrs Sensors Compass, altimeter, SPO2, ECG, HRM, accelerometer, gyroscope, ambient light Dimensions 40x34x10.4mm, 30.5g (40mm); 44x38x10.4, 36.5g (44mm)