Battery Life
Up to 18 hours
Chip
W2 chip
Dimensions (H x W x D)
38.6 x 33.3 x 11.4 mm (38 mm), 42.5 x 36.4 x 11.4 mm (42 mm)
Materials
Ion-X strengthened glass, Composite back (GPS), Ceramic back (GPS + Cellular)
Operating System
watchOS 4
Processor
Faster Dual-core processor
Sensors
Built-in GPS and GLONASS, Barometric altimeter, Heart rate sensor, Accelerometer and gyroscope
Storage Capacity
8 GB (GPS), 16 GB (GPS + Cellular)
Weight (Case)
26.7 g (38 mm GPS), 28.7 g (38 mm GPS + Cellular), 32.3 g (42 mm GPS), 34.9 g (42 mm GPS + Cellular)
Wireless Networking Standard
Wi-Fi 802.11b/g/n 2.4 GHz, Bluetooth 4.2