Z10 smart Watch - Android 5.1, MTK6580, OS 16GB, phone support SIM card, GPS Wifi - BlackKey Features...1.39` OLEDRoundDisplay 400*400 in resolutionMTK6580 quad core ProcessorRAM 1GB + 16GB in flashOS Android 5.1Bluetooth / GPS / WiFi SupportedFrequency Band: 2G: GSM 850 / 900 / 1800 / 19003G: WCDMA 850 / 21002.0MP Camera, Heart Rate Monitor, Pedometer350 mAh for batteryAvailable with IOS Smart P..