Maxell 190400 Noise Cancellation Headphone Noise cancellation headphones help reduce ambient noise and the stress levels caused by noise Collapsible and Compact For Easy Storage It has improved frequency response Automatic Noise Reduction Lightweight and Easy To Adjust Connectivity technology : Wired Noise cancellation headphones help reduce ambient noise and the stress levels caused by noise Over 50 hours of use with 2 AAA batteries(not included) Dual Prong adapter for airline use included Folding for easy storage and portabililty Includes a travel pouch