
Built-in GPS and GLONASS Faster dual-core processor W2 chip Barometric altimeter Capacity 16GB1 Heart rate sensor Accelerometer and gyroscope Water resistant 50 meters2 Ion-X strengthened glass Ceramic back Wi-Fi (802.11b/g/n 2.4GHz) Bluetooth 4.2 Up to 18 hours of battery life3 watchOS 4