The ATH-ANC25 QuietPoint® Noise-Cancelling On-Ear Headphones block up to 80% of environmental noise and offer outstanding sound quality, comfort and portability. The headphones feature soft ear pads and a cushioned headband for long-wearing comfort. The detachable cord offers a convenient in-line volume control. Unlike many other noise-cancelling headphones, the ATH-ANC25 audio functions even without batteries or when its noise-cancelling function is turned off. The headphones are compatible with the Apple® iPod®, iPhone™ and iPod touch®, and perfect for use with portable music and DVD players, laptop computers, in-flight entertainment systems and other devices. The ATH-ANC25 folds for easy portability and storage.Read how Active Noise-cancelling Headphones work.