Able Planet Sound Clarity Active Noise Canceling Headphones (Discontinued by Manufacturer) Patented LINX AUDIOTM technology provides award winning sound quality State-of-the-art active noise cancellation (ANC)Operates as normal headphones when ANC function is turned off, or if batteries run out Ideal for creating your own personal space filled with full rich sound or nothing at all Lightweight adjustable headband provides superior fit Full-size ear cups In-line volume control enables easy adjustment to safe listening levels for hearing preservation