A1 smart watch support 2G GSM SIM Card , you can directly make a call Via bluetooth Connection with your Smart phones Or you can make phone call and send txt messenger from the Watch when you insert a GSM 850 900 1900 1800 Sim card</br>The smart watch has a rear camera,you can use the watch to take photos.</br>Sync function: Whatsapp,Twitter,Facebook,Browser(need put a 2G/2.5G network SIM card)</br>Can play music from your phone via bluetooth or from the local SD card</br>Sport health: Pedometer,sleep monitoring,sedentary remind</br></br>Product Description</br></br><br>Features:</br> <br>240 x 240 pixel HD Display Screen</br> <br>Make and Receive Phone Calls</br> <br>Read and Send Text Messages (ANDROID ONLY)</br> <br>Take Photos directly from the Watch Camera</br> <br>Control the Camera on your Phone from your Watch</br> <br>Play Music through your Watch from Your Phone</br> <br>380 mAh battery provides 10 + hours of standby and 2 - 3 hours talk time</br> <br>Sedentary Reminder to Keep you Active</br> <br>Pedometer</br> <br><br>Notifier Alerts you when Apps on your Phone need Attention (ANDROID ONLY)</br> <br>Speaker is Loud and Easy to Hear--Never Miss Alerts</br> <br>Strong Vibration Alert</br> <br>Calculator</br> <br>Sleep Monitor</br> <br>Internet Browser (requires SIM card)</br> <br>Whatsapp (requires SIM card)</br> <br>Facebook (requires SIM card)</br> <br>High Sensitivity Touch Screen with Excellent Touch Accuracy</br> <br>Antennae embedded in the wrist band</br> <br>Supports Micro SD Card up to 32 MB (SD Card not Included)</br> <br>3 Menu Color Themes to Choose from</br></br><br/>http://www.amazon.com/gp/product/B01MRJPX0G