Phiaton BT 220 NC Wireless Bluetooth 4.0 and Active Noise Cancelling Earphones ANC: Active Noise Cancelling earphones blocks up to 95% of ambient background noise. Can pair via NFC as well Everplay-X technology allows you to continue calling or listening to your music, even if the battery runs out or your audio device is not Bluetooth compatible (via supplied cable) 17 of hours calling time, 17 hours of music listening time and 300 hours of standby CVC (Clear Voice Capture) Technology makes phone calls crystal clear for the person on the other end of the line. Music Play Time: 10 hrs / 17 hrs (NC on / off)