45 x 38 x 10.7 mm (1.77 x 1.50 x 0.42 in) (HxWXD)

31.9 g (41mm), 38.7 g (45mm) (1.13 oz)

Glass front, ceramic/sapphire crystal back, aluminum frame

eSIM

Water resistance 50m (swim proof), Dust resistance IP6X

Retina LTPO OLED, 2000 nits (peak)

1.9 inches

484 x 396 pixels (~326 ppi density)

Ion-X strengthened glass

Edge-to-edge display, Always On Display

watchOS 10

S9 SiP with 64-bit dual-core processor

4-core Apple Neural Engine

PowerVR

Wi-Fi 4 (802.11n)

Bluetooth 5.3

L1 GPS, GNSS, Galileo, and BeiDou

Blood oxygen sensor and app, Electrical heart sensor and ECG app, Third-generation optical heart sensor, High and low heart rate notifications, Irregular rhythm notifications, Sleep stages, Temperature sensing, Compass with Waypoints and Backtrack, Always-on altimeter, High-g accelerometer, High dynamic range gyroscope, Ambient light sensor

Emergency SOS, International emergency calling, Crash Detection, Fall Detection

Li-Ion 308 mAh, non-removable

USB-C magnetic fast charging cable

Up to 18 hours normal use, Up to 36 hours in Low Power Mode