Smartwatch, Bluetooth Smart Watch Sleep Monitor Touch Screen with SIM & SD Card Band with Pedometer Compatible with Android/iOS/Samsung/Huawei/HTC/Sony/Nexus Men Women Multi-Function:this Smart watch have many functions Such as pedometer\sleep monitor\music player\camera\cslrndar\calculator \facebook\twitter\browser\Alarm clock\Sound recorder. Anti-lost: Smart watch prevent the loss of yur mobile phonr or watch.but disconnect when exceed the distance of 8 meters,the feature will be unusable before reconnect with bluetooth. Compatibility and Comfortable: Smart watch Functions available for iOS phones and Andeoid. Features(Notification Sync\Remote camera\Anti-lost) are only for Android smart phones. Ergonomic convex design, precision laminating process and soft strap which make the wearing of the wrist watch more comfortable. SIM mode:The Smart watch support 2G micro SIM card(GSM850/900/1800/1900 MHz) after have inserted micro SIM card you can make/answer calls and send/receive messages through smart watch . Bluetooth mode:after have installed the sync APP make/answer cslls and send/receive messages from your smart phone via Bluetooth.Connect to other Bluetooth devices.