1. Support SIM card ?? Cell phone and Bluetooth smart watch in one?? answer calls directly from your wrist</br>2. Support mp3 / video play?? fitness tracker</br>3. Bluetooth companion: sync calls?? phonebook?? music?? with smart phone</br>4. Touch screen?? 240*240 pixel HD display?? 2.0M camera with video?? support up to 32G exte"y</br>5. Pedometer?? sleep monitor ?? FM?? alarm</br></br>Product Description</br></br>Notice One:<br> All functions are available for Andorid Smartphone.But for IOS phones??Some functions can not be used??Please see the description carefullly??it does not support SMS synchronization when use bluetooth for IOS phone. <br>Notice Two: This watch with whatsapp facebook twitter icon?? but could not support whatsapp ??facebook ??twiiter use now . Because the USA server with some problems now.Alll other function are work well . Hope buyer can check careful. <br>What's the difference between putting into micro SIM card and connecting Bluetooth? <br> If you put into a SIM card??the watch can be used as a standalone smartphone on your wrist??like making calls??receiving or sending texts.Through Blue