45mm or 41mm case size

Aluminum or stainless steel

Speaker

Microphone

Control: 

Digital Crown with haptic feedback

Side button

Double tap gesture

On-Device SiriFootnote

Display: 

Always-On Retina LTPO OLED display

Edge-to-edge display

Ion-X front glass (Aluminum cases)

Sapphire front crystal (Stainless steel cases)

Up to 2000 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 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

Safety: 

Emergency SOS 

International emergency calling 

Crash Detection 

Fall Detection 

Splash, Water and Dust: 

Water resistance 50m (swim proof) 

Dust resistance IP6X 

Connectivity and Communication: 

L1 GPS, GNSS, Galileo, and BeiDou

LTE and UMTS 

Wi-Fi 4 (802.11n)

Bluetooth 5.3

Second-generation Ultra Wideband chip 

Apple Pay

GymKit

Power and Battery Life: 

Built-in rechargeable lithium-ion battery

Up to 18 hours normal use 

Up to 36 hours in Low Power Mode 

USB-C magnetic fast charging cable

Environmental Requirements: 

Operational temperature: 32°F to 95°F (0°C to 35°C)

Nonoperational storage temperature: 4°F to 113°F (-20° to 45°C)

Relative humidity: 5% to 90% noncondensing

Operating Altitude: 0 feet to 10,000 feet (0 m to 3000 m)

Size & Weight

Height: 41mm

Width: 35mm

Depth: 10.7mm

Weight (Aluminum, GPS): 31.9g

Weight (Aluminum, GPS + Cellular): 32.1g

Weight (Stainless Steel): 42.3g

Height: 45mm

Width: 38mm

Depth: 10.7mm

Weight (Aluminum, GPS): 38.7g

Weight (Aluminum, GPS + Cellular): 39.0g

Weight (Stainless Steel): 51.5g