Features: Advanced CPU MTK6580 Quad Core 1.3GHz, quick data processing. Android 5.1 operation system, easy online upgrade. Support Nano SIM card and 2G GSM 3G WCDMA network. Support WiFi 802.11b/g/n connection, convenient for you to get web. Compatible for iOS 9.0 Android 5.0 or above, with BT 4.0 it can connect with a phone to synchronize information. 1.39inch Super AMOLED touch screen with 400 * 400 pixel, large and clear to see. ROM 16GB and RAM 1GB, larger than normal watch. 5.0MP camera, clear to take photos. Made from silicone watch band and stainless steel case, durable and comfortable. Other Functions: Dial, Message, Heart Rate Monitoring, Pedometer(Steps, Calorie, Distance), Camera, Remote Control Camera, Music, Alarm, Calendar, Browser, Mobile Phone Anti-lost, Map etc. Note: please scan the QR code(show on the screen) to download app and install. Hardware Parameters: CPU: MTK6580 1.3GHz, Quad Core Operation System: Android 5.1 SIM Card: Nano SIM (Single) Compatibility: iOS 9.0 Android 5.0 or Above BT: 4.0 Screen: 1.39inch Super AMOLED Touch Screen, 400 * 400 Pixel, 326 PPI WiFi: 802.11b/g/n Network: 2G: GSM 850 / 900 / 1800 / 1900Mhz 3G: WCDMA 850 / 2100Mhz RAM : 1GB ROM: 16GB Camera: 5.0MP Battery: Built-in 3.7V, 350mAh Polymer Lithium ion Battery Charging: Magnetic Pin Charger Standby Time: Approx. 48h Language: English, French, Italian, German, Japanese, Russian, Polish, Portuguese, Indonesian, Turkish, Hebrew, Arabic, Persian, Hindi, Bengali, Thai, Burmese, Korean Main Functions: Dial: Support Message: Support Heart Rate Monitoring: Support Pedometer: Steps, Calorie, Distance Camera: Support Photo Gallery: Support Remote Control Camera: Support Music: Support Alarm: Support Sound Recording: Support Calendar: Support Setting: Support Browser: Support Map: Support GPS: Support Weather: Support Mobile Phone Anti-lost: Support