49mm case
Aerospace grade titanium
Dual speakers
Three-microphone array with beamforming and wind noise mitigation

Control:
Customizable Action button
Digital Crown with haptic feedback
Side button
Double tap gesture^
On-Device Siri^

Display:
Always-On Retina LTPO OLED display
Flat sapphire crystal display
Up to 3000 nits maximum brightness
1 nit minimum brightness

Chip:
S9 SiP with 64-bit dual-core processor
4-core Apple Neural Engine
64GB capacity
Sensors:
Blood oxygen sensor and app3
Electrical heart sensor and ECG app4
Third-generation optical heart sensor
High and low heart rate notifications4
Irregular rhythm notifications5
Sleep stages
Temperature sensing6
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

Safety:
Emergency SOS8
International emergency calling9
Siren
Crash Detection8
Fall Detection8
Splash, Water and Dust:
Water resistance 100m (swim proof)12
Dust resistance IP6X19
EN13319 recreational scuba diving to 40m12
Tested to MIL-STD 810H: altitude, high temperature, low temperature, temperature shock, immersion, freeze with thaw, ice and freezing rain, and shock and vibration20
Connectivity and Communication:
Precision dual-frequency GPS: GPS, GNSS, Galileo and BeiDou
LTE and UMTS13
Wi-Fi 4 (802.11n)
Bluetooth 5.3
Second-generation Ultra Wideband chip21
Apple Pay
GymKit

Power and Battery Life:
Built-in rechargeable lithium-ion battery
Up to 36 hours normal use18
Up to 72 hours in Low Power Mode18
USB-C magnetic fast charging cable

Environmental Requirements:
On-wrist operating temperature: -4° F to 130° F (-20° C to 55° C)
Operational temperature: 32°F to 95°F (0°C to 35°C)
Nonoperational storage temperature: 4°F to 113°F (-20° to 45°C)
Dive operating temperature: 32°F to 104°F (0°C to 40°C)
Relative humidity: 5% to 90% noncondensing
Operating Altitude: -1600 feet to 29,500 feet (-500 m to 9000 m)