Bluetooth Smart Watch with SIM Card Slot and NFC Smart Health Watch Bracelet Smartwatch for Samsung HTC and Other Android Smartphones- Gray Black band Classic and customizable style,1.54" IPS LCD 2.5D Radian Capacitive Touch Screen for easy operation.Built-in SIM card slot and TF card slot,Support Bluetooth connection It becomes a standalone watch phone with SIM card inserted, working in 2G GSM 850/900/1800/1900 MHz Network. You can send and read texts, make or receive calls on your watch.Simply like a GSM cell phone. Without SIM card, it works as a cell phone companion,receiving and making calls, getting texts via Bluetooth Function:Bluetooth Dialer,Pedometer,Sleep monitor,Sedentary Reminder,Music Player,Alarm Clock, Watch,Camera,Remote camera,Bluetooth SMS/IM Message Notifier,Message Reminder,Call Reminder,Answer Call,Dial Call Phone function: Make phone call directly from the smart watch,including answering and dial-up.SIM slot,support make calls by Bluetooth or smart watch;Sync function: QQ,wechat,Twitter,Facebook;time,schedule,read message or news;Entertainment: MP3,MP4,Camera Note:Compatible with Android System(full function support)and IOS System (limited function support,it can work with iPhone as a Bluetooth device,but Notification Push,Remote capture,Anti-lost are currently unavailable on iOS)