Housing material ceramic, polycarbonate, stainless steel, Bracelet Material Silicone, Display 1.39 ", 454x454 pixels, AMOLED, capacitive touchscreen, Gorilla Glass 3, round, OS proprietary, CPU 4x 1.10GHz Cortex-A7 (Qualcomm Snapdragon Wear 2500), 512MB RAM, Interfaces Bluetooth 4.2, WLAN 802.11b / g / n, Accelerometer, gyroscope, light sensor, compass, heart rate monitor (optical), Compatibility from Android 5.0, from iOS 10, memory 4GB, Power supply battery (420mAh), Operating time 28h, Dimensions (case) 35.4x35.4x13.7mm, Dimensions (bracelet) 22mm, changeable, weight 49g, Special features IP68-certified, hands-free system, telephone function (GSM, UMTS, LTE), GPS, GLONASS, Galileo