49mm case

Always-On Retina LTPO OLED display, up to 3000 nits

Flat sapphire crystal display

GPS + Cellular model

S9 SiP with 64-bit dual-core processor; W3 wireless chip; 2nd-generation Ultra Wideband chip

Digital Crown with haptic feedback; side button; Action button; double tap gesture; on-device Siri

Temperature sensor; blood oxygen sensor; electrical heart sensor and third-generation optical heart sensor; depth gauge; water temperature sensor

High and low heart rate notifications, irregular rhythm notifications, and ECG 

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

Water resistant 100 meters

Recreational dive to 40 meters

EN13319

Dust resistant (IP6X)

LTE and UMTS,14 Wi-Fi 4 (80211n), and Bluetooth 5.3

GPS/GNSS, compass, and always-on altimeter

Dual speakers and three-mic array with beamforming

64GB capacity