Digital Silence DS101A Noise Cancelling Earphones / Headphones with Mic (Black) Class-leading Wolfson myZoneTM Ambient Noise Cancellation Technology Over 30 hours of HD quality music playback or talktime with ANC for maximum use on the move Keep listening or talking if the battery is flat  works as a normal headset until you recharge Convenient call management / music controls so your phone can stay in your pocket High quality voice microphone for crisp and clear phone conversations