SIM CARD SLOT It also has its own SIM card slot, allowing it to become its own communication device that can make or receive calls, text and read or send emails etc. FUNCTIONS You can use the smart watch to make or answer calls. The watch's built-in speaker allows you to listen to your favorite music anywhere. Anti-lost alarm function, push notifications, remote camera. The watch has a sleep monitor, a pedometer, a sedentary reminder, water in-take reminder. A stopwatch so it helps to keep a tab on your activities. Bluetooth Dialer,Pedometer,Sleep monitor,Sedentary Reminder,Music Player,Alarm Clock, Watch,Camera,Remote camera,Bluetooth SMS/Message Notifier,Message Reminder,Call Reminder,Answer Call,Dial Call,NFC for quick pairing. Sync function: whats app, Twitter,Facebook;time,schedule,read message or news;Entertainment: MP3,MP4,Camera. NEW TECHNOLOGY AND USER INTERFACE Moreover with its help you can send personal messages to your friends or even your heart pulse to your significant other via taps, in case they own a smartwatch too. In a similar way, the unique Taptic Engine is designed to give you delicate and fully customizable nudges when you get a notification. BLUETOOTH HEADSET FULLY COMPATIBLE Bluetooth connection support ninety nine percent of mobile phone market Apple,samsung,HTC,Nokia,Motorola, most have bluetooth function and mobile phone can use.