Headphones are specially-designed to deliver superior noise-cancellation by actively reducing harmful and annoying low frequency sounds in noisy environments. The deluxe, over-ear cups with soft cushions deliver passive noise suppression, as well. Together, the passive and active noise-cancelling technology creates a quiet, soothing environment to focus on the audio in your headphones or have some peace with no sound. The active noise cancelling (ANC) circuitry runs on one AAA battery (not included) and comes with a zippered carry case for protection and easy storage. Featuring an adjustable padded headband and a removable 5' Dura-Cord™ that can be swapped out for a 5' Dura-Cord™ with an in-line microphone to turn your headphone into a headset. The headset Dura-Cord™ #180872 is sold separately.