Disso(TM) HD 1.54" Display Capacitive Screen & Camera, Built-in SIM Card Slot, Independent Working Unlock Wirst Cell Phone, Smart Watch Mobile Phone, Bluetooth Synced Android Smartphone (Black) Fashion design, ultra thin, 8.9mm thickness, 1.54" no frame big HD IPS display screen, 2.5D Radian capacitive touch screen. TPSIV silicone strap, Anti sweat matte surface treatment, Ergonomic convex design comfortable wear. Zinc alloy arc primary drawing, sweatband surface hardening process, the longer fresh. Ultrasound closed aluminum sound chamber, listening to the sounds of nature. answer calls / listen to music without connecting headphone 450mAh Li-polymer battery, removable, ultrasound technology, safe and reliable. Built-in micro SIM card slot, Quad-band GSM 850/900/1800/1900Mhz, It can work independently without the need to synchronize with other smart phones. More functions: Phone call, answer, message, Browser, camera, music, Recorder, Time, Pedometer, Sleep monitor, Alarm, Sedentary reminder, Remote camera, Anti-lost, Smart sync Bluetooth 3.0 sync compatible Android (Call, Phonebook, SMS, Wechat , Twitter, Facebook and more)