Winner of the CES Innovation Engineering Design Award these premium noise cancelling headphones are extremely efficient and comfortable. They can literally lock out the sounds of a jet engine while travelling or provide you with the ultimate peace and quiet at home. With 90% noise reduction there is only one other company in the entire world that can provide 90% active noise-cancelling. These headphones come with in a semi-hard case for travel and include an Airline Adaptor kit useable for all planes. Active noise cancelling is powered by AAA battery with up to 30 hours of noise cancelling power. The great thing about these headphones is that you can use them as normal headphones when the noise cancelling option is off, and even without a battery. A must have amongst travelling professionals and music lovers. The ANC7b is one of the most exciting headphones Audio-Technica has created and will be around for many years to come.