Apple Watch Series 3 42MM Space Gray

Aluminum case with Sport Band or Sport Loop
Faster dual-core processor
Apple wireless chip
Series 3 GPS
GPS, GLONASS, Galileo, and QZSS
Barometric altimeter
Water resistant 50 meters1
Heart rate sensor
Accelerometer
Gyroscope
Ambient light sensor
Siri speaks
Capacity 8GB
Composite back
Wi-Fi (802.11b/g/n 2.4GHz)
Bluetooth 4.2
Second-generation OLED Retina display with Force Touch
2x brighter (1000 nits)
Ion-X glass
272 by 340 pixels (38mm)
312 by 390 pixels (42mm)
Built-in rechargeable lithium-ion battery
Up to 18 hours3
Magnetic charging cable
USB power adapter
Supports AirPower mat4