Audio Technica QuietPoint ATH-ANC3

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Used once on a long-haul return to Nicaragua. Quality noise-reduction earbuds with airline friendly extras such as flight console plug adaptor (gold pin) and extension lead. In excellent condition, these cost me NZ$320 so my asking price of $150 with freepost within NZ is a bargain.

The publicity guff reads:
Introducing the Audio-Technica ANC3 noise-cancelling headphones. Using patented technology, these headphones detect external environmental noise through miniature microphones incorporated into each ear bud. These create an equal but opposite noise signal which is added to the music signal and so cancels out up to 85% external noise whilst still being able to enjoy rich sound.

The ANC3 noise-cancelling in-ear headphones are perfect for use on airplanes and trains, whilst exercising or anywhere you just want to listen to music - and just the music. With total listening comfort, the earphones have ear tips to give a totally customisable fit in the ear canal. ANC3 noise-cancelling earphones include a useful compact control unit which allows users to hear important outside announcements or conversations. These fabulous, great value for money headphones also operate in passive mode when the noise cancelling function is turned off so can be used without batteries.

Audio-Technica's ANC3 is supplied in a hard, durable carrying case, and comes with an adjustable cable, an additional extension cable, a clothing clip, one AAA battery and an airline adaptor for connection to all in-flight entertainment systems.

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Sold to the jet-setting billionaire on Runway 8.