Silver aluminum case

S1P dual-core processor

Splash resistant1

Ion-X glass

OLED Retina display with Force Touch (450 nits)

Composite back

Digital Crown

Heart rate sensor, accelerometer, and gyroscope

Ambient light sensor

Speaker and microphone

Wi-Fi (802.11b/g/n 2.4GHz)

Bluetooth 4.0

Up to 18 hours of battery life3

watchOS 3