Phiaton Chord MS 530 M-Series Wireless & Active Noise Cancelling Headphones with Microphone ANC: On 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 WARRANTY: Continue to enjoy your bluetooth wireless device long after the Amazon return period expires. All Phiaton bluetooth wireless products come with a One Year Warranty and we stand behind all of our products with a US based customer service.