Creative HN-900 Noise Cancelling Headphones Earcups electronically cancel out the ambient noise by up to 85% for you to enjoy your entertainment in total bliss. Comes with an inline microphone and switch for a convenient one-click call function on an iPhone Headphone cable comes with gold-plated plugs compatible with iPhone, iPad, iPod or ZEN music players; can be unplugged from the headphones if desired Single AAA alkaline battery can power the active noise cancellation function for up to 40 hours Comes with an airplane adapter for you to connect the headphones to most in-flight entertainment systems