BLUETOOTH CALLS & MESSAGE ALERT : With built-in high performance mic, speaker and noise reduction technology, once connectied via bluetooth, you will have access to answer and make calls on your wrist easily without holding your phones all the time, imaging that you are doing exercise, cooking, housecleaning or other scene, the smart watch will greatly help you freely make or catch important calls, and vibrate to remind you with text, SNS messages (including facebook, instgram, whatsapp, etc.)