Gear S2 (SM R720)
1.2" (360 x 360 pixels)~302 ppi

Full Circular Super AMOLED capacitive touchscreen

Corning Gorilla Glass 4, Exynos 3250, 1 GHz Dual-core 

512MB Ram

4 GB internal storage

Operating System (Tizen-based wearable platform)

No sim slot

Camera-No

Heart Rate Monitor-Yes, IP68 certified - dust proof and water
resistant over 1.5 meter and 30 minutes

Accelerometer, gyro, barometer,Ambient Light sensor, Wi-Fi 802.11 b/g/n, Bluetooth v4.1, A2DP

Wireless charger,
with A-GPS (Only 3G)

Non-removable Li-Ion 250 mAh battery, Stainless steel casing with rotating ring control,Microphone with S-Voice support,Support for non- Samsung devices as well,Extra strap,Power Saving Mode, Voice recorder,S planner