The HA-NC260 headphones from JVC provide high-quality audio and also reduce environmental noise by up to 90%, allowing you to enjoy your favorite music in peace and comfort. The headphones have 40mm neodymium drivers to produce lifelike audio with a wide frequency response to bring out all of the details in your music.The headphones employ 3 different techniques to block out sound. The first is active noise cancellation circuitry, which constantly monitors your environment and counteracts unwanted noise. The second is a unique dual housing structure in the earcups, which provides a sound-insulating layer. Finally, soft memory foam cushions surround your ear to block out any additional ambient noise. The cushions, along with the adjustable headband, also provide long-lasting comfort.The headphones operate on a single AAA battery, which provides up to 50 hours of continuous operation. The detachable cable helps to prevent tangles, and also makes it easy to disconnect from your music source and use the headphones as earmuffs if you want some peace and quiet. The headphones come with a volume attenuator to lower the volume of loud sound sources, such as airplane entertainment systems.The standard 3.5mm plug and included airplane and 1/4" adapters allow you to connect to virtually any device or sound system. A slim carrying case is also included.