Bluetooth Q18 smart watch support Call Function: GSM/GPRS 850/900/1800/1900 four frequency conversation, Dial, hands-free, phone records, phone book, Bluetooth phone. SMS Local SMS: Text messaging on mobile phones Synchronous push by Bluetooth ( for Android mobile phone). Entertainment: MP3, AVI; Bluetooth music playing; Phone calls reminding; Ring and vibration remind. Bluetooth transfer information (For Android phone) QQ, We Chat, Twitter, Facebook, Timely information etc. 400 MAH Polymer battery capacity, Ultrasonic technology, safe and reliable.