Phiaton's PS 210 BTNC combines the freedom of Bluetooth 3.0 connectivity with Phiaton's exclusive "Noise Blocker" Active Noise Cancellation technology. Answer phone calls, control your music, and activate noise cancelling all on the convenient and sleek inline dongle. Also incorporated is Phiaton's second generation "EverPlay-X" feature allowing you to enjoy your music even if the battery runs out or your music source is not Bluetooth compatible. Simply connect your earphones to your audio source using the supplied audio cable and enjoy. The PS 210 BTNC's included inline "clip and go" control dongle allows you to answer phone calls, control your music, and provides up to 14 hours of battery life and 250 hours of standby time.