Asmart center 1.54 inch S12 Bluetooth Smart Watch With Sync Call SMS Anti-lost function for all andriod smart phone iphone samsung blackberry htc (black) Bluetooth dialer:After the smart watch connected with your mobile phone via build-in Bluetooth, you can dial the calls directly from your watch and it also goes through your mobile phone. Can Sync message/phonebook of your mobile phone to the smart watch,can directly call anyone in contact from your watch and send message.Note:iphone only can Making and Receiving Calls through the watch. Sync call: the watch will show you the calling ID and remind you by ringing or vibration.Can answer/reject calling directly from the watch. Anti Lost: Watch will automatically alarm you when Bluetooth connection lost ,normally the distance is 10 meters. 1.54 inch Sensitive Capacitive screen,the smart watch make your life more easier!