49 x 44 x 14.4 mm (1.93 x 1.73 x 0.57 in) (HxWXD)

61.4 g (2.15 oz)

Sapphire crystal front, ceramic/sapphire crystal back, titanium frame

eSIM

Water resistance 100m (swim proof), Dust resistance IP6X10, EN13319 recreational scuba diving to 40m, Tested to MIL-STD 810H: altitude, high temperature, low temperature, temperature shock, immersion, freeze with thaw, ice and freezing rain, and shock and vibration

Retina LTPO OLED, 3000 nits (peak)

1.92 inches

502 x 410 pixels (~338 ppi density)

Sapphire crystal glass

Flat sapphire crystal display, Always On Display

watchOS 10

S9 SiP with 64-bit dual-core processor

4-core Apple Neural Engine

64GB capacity

Wi-Fi 4 (802.11n)

5.3, A2DP, LE

Precision dual-frequency GPS: 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, Depth gauge ±1m accuracy and app, Water temperature sensor, Compass with Waypoints and Backtrack, Always-on altimeter, High-g accelerometer, High dynamic range gyroscope, Ambient light sensor

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

Li-Ion 564 mAh, non-removable

USB-C magnetic fast charging cable

Up to 36 hours normal use, Up to 72 hours in Low Power Mode