Eliminates at least 85% of unwanted background noise (like crying babies, people talking on their cell phones, etc) so you can listen to music, watch TV or a movie much more comfortably. Headphones fold completely flat and have a built-in option button that let you listen to someone without removing the headphones. Provides high quality stereo sound and is ideal for computers, iPads, cell phones, MP3 players or any other audio source. Includes storage pouch, detachable cord for connection to all audio devices, and airplane double-prong adapter. Includes 1 AAA battery.