1.2-inch / 1.3-inch (360×360 pixels) Circular Super AMOLED Always On display,Corning Gorilla Glass DX+ protection
1.15GHz Dual-Core Exynos 9110 processor
768MB RAM, 4GB internal memory
Tizen Based Wearable OS 4.0 (Compatible with Android 5.0 or later and iPhone 5 and above, iOS 9.0 or above)
5ATM + IP68 water resistance, MIL STD 810G
Dimensions (46mm): 446 x 49 x 13; Weight: 63g (without strap)
Dimensions (42mm) 41.9 x 45.7 x 12.7; Weight: 49g (without strap)
Sensors: Accelerometer, Gyroscope, Heart Rate, Ambient Light, Barometer
Bluetooth 4.2, Wi-Fi b/g/n, NFC, A-GPS/Glonass
472mAh (46mm) / 270mAh (42mm) Li-ion battery with wireless charging (WPC Inductive), up to 4 days of battery life