Phiaton BT 330NC Wireless & Active Noise Cancelling On-ear Headphones with Microphone ANC: Over the Ear Headphones with Active Noise Cancelling technology cancels ambient noise by up to 98%. Keep Going: 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) Double the Fun: Multipoint connection connects two devices at the same time Long Battery Life: The MS Chord 530 provides up to 30 Hours of Talk/Music time or 18 Hours of Talk/Music time with Noise Cancelling turned on