Features： Support Nano SIM card and 2G GSM & 3G WCDMA network. Built-in GPS module, receive satellite GPS signal. 1.53inch IPS Display touch screen with 320* 320 pixel, large and clear to see. Android 5.1, advanced CPU MTK6580 Quad core 1.3GHz, quick data processing. ROM 16GB and RAM 1GB. 2.0MP camera, clear to take photos. Compatible for iOS 9.0 & Android 5.0 or above, with BT 4.0 it can connect with a phone to synchronize information. Support WiFi 802.11b/g/n connection, convenient for you to get web. The watch can standby for 48 hours without any function being turned on. Other Functions: Dial, Message, Heart Rate Monitoring, Pedometer (Steps, Calorie, Distance), Camera, Remote Control Camera, Alarm, Calendar, Browser, Mobile Phone Anti-lost, Map etc.