41mm
Height: 41mm
Width: 35mm
Depth: 10.7mm
Weight (Aluminum, GPS): 31.9g
Weight (Aluminum, GPS + Cellular): 32.1g
Weight (Stainless Steel): 42.3g
45mm
Height: 45mm
Width: 38mm
Depth: 10.7mm
Weight (Aluminum, GPS): 38.7g
Weight (Aluminum, GPS + Cellular): 39.0g
Weight (Stainless Steel): 51.5g
45mm or 41mm case size
Aluminum or stainless steel
Speaker
Microphone
Digital Crown with haptic feedback
Side button
Double tap gesture
On-Device Siri
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
S9 SiP with 64-bit dual-core processor
4-core Apple Neural Engine
64GB capacity
Electrical heart sensor and ECG app1
Third-generation optical heart sensor
High and low heart rate notifications1
Irregular rhythm notifications2
Sleep stages
Temperature sensing3
Compass with Waypoints and Backtrack
Always-on altimeter
High-g accelerometer
Ambient light sensor
Emergency SOS4
International emergency calling5
Crash Detection4
Fall Detection4
Water resistance 50m (swim proof)6
Dust resistance IP6X9
L1 GPS, GNSS, Galileo, and BeiDou
LTE and UMTS7
Wi-Fi 4 (802.11n)
Bluetooth 5.3
Second-generation Ultra Wideband chip10
Apple Pay
GymKit
Built-in rechargeable lithium-ion battery
Up to 18 hours normal use8
Up to 36 hours in Low Power Mode8
USB-C magnetic fast charging cable
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)