IP6X certified100m water resistant (WR100)40m swimproof/diving (EN13319)MIL-STD 810H certifiedECG certified (region dependent SW application; HW available on all models)
display
TypeRetina LTPO OLED, 3000 nits (peak)
Size1.92 inches
Resolution502 x 410 pixels (~338 ppi density)
ProtectionSapphire crystal glass
Always-on display
platform
OSwatchOS 10
ChipsetApple S9
CPUDual-core
GPUPowerVR
memory
Card slotNo
Internal64GB
camera
No
sound
LoudspeakerYes, with dual speakers (86-decibel)
3.5mm jackNo
comms
WLANWi-Fi 802.11 b/g/n, dual-band
Bluetooth5.3, A2DP, LE
GPSGPS (L1+L5), GLONASS, GALILEO, BDS
NFCYes
RadioNo
USBNo
features
SensorsAccelerometer, gyro, heart rate, barometer, always-on altimeter (-500m to 9000m), compass, SpO2, VO2max, temperature (body), temperature (water)
Temperature sensing (0.01˚ accuracy)Depth gauge (±1m accuracy)Natural language commands and dictation (talking mode)Ultra Wideband 2 (UWB) support