Samsung Gear S2 Classic Smartwatch w/Rotating Bezel and Leather Strap - Black 1.2-inch Super AMOLED Capacitive Multitouch, 360 x 360 pixel resolution (424ppi pixel density) w/ Corning Gorilla Glass 3 OS: Tizen 2.3, Chipset: Samsung Exynos Dual 3250, Processor: Dual-Core 1 GHz Cortex-A7, GPU: Mali-400 MP2 Bluetooth: v4.1, A2DP; WLAN: Wi-Fi 802.11 b/g/n; Web: HTML, XHTML, HTML5; Sensors: Accelerometer, Ambient Light, Gyroscope, Barometer, Heart Rate Features Samsung Pay, S-Voice, S-Heatlh, Wireless Charging (Qi), IP68 Certification (Dust and Water Resistant Up to 1.5m & 30min) Non-Removable 300 mAh Lithium Ion Battery - Standby: Up to 48h (2880 min)