Smart Devices

1m Magnetic Charging Cable
5W USB Power Adapter
Space Gray Aluminum Case
Sport Band

Aluminum Chassis with Ion-X Glass
1.5" 312 x 390 1000-Nit Display
Activity and Heart Rate Monitoring
Changeable Faces with Widgets
Siri Integration
Displays Notifications and Runs Apps
Water Resistant to 164'
Integrated GPS
Bluetooth 4.2, 802.11b/g/n Wi-Fi
Apple watchOS 4.0

Dimensions: Height: 42.0mm, Width: 35.9mm, Depth: 10.5mm, Case Weight: 25g (1.65 x 1.41 x 0.41 in inches, 1.05 oz)
Gorgeous anodised aluminium case; Ion-X glass
Retina display with Force Touch; Composite back, Splash and Water resistant in rain, exercising, etc (but not to be submerged in water, as it's not waterproof!)
Sport Band with stainless steel pin; Digital Crown
Heart rate sensor, accelerometer and gyroscope; Ambient light sensor

iwatch series3428MM screen

GPS

Black face

Black sport band

GPS + Cellular
Over 30% larger display and 50% louder speaker
Electrical and optical heart sensors
Digital Crown with haptic feedback
S4 SiP with faster 64-bit dual-core processor
Improved accelerometer and gyroscope for fall detection
Swimproof

GPS + Cellular
Over 30% larger display and 50% louder speaker
Electrical and optical heart sensors
Digital Crown with haptic feedback
S4 SiP with faster 64-bit dual-core processor
Improved accelerometer and gyroscope for fall detection
Swimproof

LTPO OLED Always-On Retina Display
Digital Crown with Haptic Feedback
Generate Your Own ECG
Fall Detection + SOS Emergency

Electrical and optical heart sensors
Digital Crown with haptic feedback
S4 SiP with faster 64-bit dual-core processor
Improved accelerometer and gyroscope for fall detection
Swimproof

GPS + Cellular
Over 30% larger display²
Electrical and optical heart sensors
Digital Crown with haptic feedback
50% louder speaker²
S4 SiP with faster 64-bit dual-core processor
Apple Watch Series 4 (GPS + Cellular) requires an iPhone 6 or later with iOS