Display
-
44mm
-
368 by 448 pixels
-
977 sq mm display area
-
-
40mm
-
324 by 394 pixels
-
759 sq mm display area
-
-
Always-On Retina LTPO OLED display
-
1000 nits brightness
-
Chip
-
S6 SiP with 64-bit dual-core processor
-
W3
-
Apple wireless chip
-
-
U1 chip
-
(Ultra Wideband)
-
Power
-
Built-in rechargeable lithium-ion battery
-
Up to 18 hours9
-
-
Magnetic charging cable
Dimensions
40mm
-
Height: 40mm
-
Width: 34mm
-
Depth: 10.7mm
44mm
-
Height: 44mm
-
Width: 38mm
-
Depth: 10.7mm
Finishes
GPS + Cellular
-
Aluminium
-
Silver
-
Space Gray
-
Gold
-
Blue
-
GPS
-
Aluminium
-
Silver
-
Space Gray
-
Gold
-
Blue
-
Features
-
GPS/GNSS
-
Compass
-
Always-on altimeter
-
Water resistant
-
50 meters1
-
-
Blood oxygen sensor
-
(Blood Oxygen app)2
-
-
Electrical heart sensor
-
(ECG app)3
-
-
Third-generation optical heart sensor
-
International emergency calling5
-
Emergency SOS4
-
Accelerometer
-
up to 32 g-forces with fall detection
-
-
Gyroscope
-
Ambient light sensor
-
Speaker
-
Microphone
-
Apple Pay
-
Gym Kit
-
Capacity 32GB
-
Ceramic and sapphire crystal back