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Available from these sellers.
Size: 40mm
40mm
44mm
Style:
Silver Aluminum with White Sport Band
GPS + Cellular
Always-On Retina display
30% larger screen
Swimproof
ECG app
Electrical and optical heart sensors
Built-in compass
Elevation
Emergency SOS
International emergency calling
Size: 40mm
40mm
44mm
Style:
Silver Aluminum with White Sport Band
GPS + Cellular
Always-On Retina display
30% larger screen
Swimproof
ECG app
Electrical and optical heart sensors
Built-in compass
Elevation
Emergency SOS
International emergency calling
| Case Size | 40mm, 44mm | 38mm, 42mm |
| Display Area | 759 sq mm or 977 sq mm display area | 563 sq mm or 740 sq mm display area |
| Case Thickness | 10.7mm | 11.4mm |
| Processor | 64-bit dual-core S5 processor; Up to 2x faster than S3 processor | Dual-core S3 processor |
| Electrical Heart Sensor | Electrical heart sensor (ECG app) | |
| Optical Heart Sensor | Second-generation optical heart sensor | Optical heart sensor |
| Fall Detection | ![]() | |
| Digital Crown | Digital Crown with haptic feedback | Digital Crown |




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