TDK Life on Record Noise Cancelling Headphones reduce unwanted ambient sound to give you a better more relaxed listening experience. Essentially, active noise reduction works by using a microphone on the outside of the headphone to pick up external ambient noise. This is then sent to a digital processor which generates an antiphase wave with the opposite polarity of the sound wave coming through the microphone. As a result, the external ambient noise is reduced within the enclosed listening space. TThe NC400s deliver effective noise reduction in such environments as aircrafts, trains, cars, buses and other public places where excessive ambient noise is present. The active noise cancelling feature works with or without music playing through the headphones.

USED BUT EXCELLENT CONDITION Comes with: carry case, air plain adapter and 1x AA batteries. Please see picture for more details.

CELLFONE1 NZ OWNED and OPERATED We Are GST Registered company Tax Invoice on request Pickup from Archers rd. Glenfield or courier delivery nationwide via courier post. Thanks for looking-:))