Sony's Noise Cancelling Over-Ear Headphone feature 30mm dynamic drivers for an improved audio experience and a mammoth 80 hours of battery life; giving you better listening for longer. - Even when the batteries run out; Sony Noise Cancelling Over-Ear Headphone provide passive noise cancellation; so your music listening isn't ruined when you're on the go - A swivel mount and folding enclosure provide an easy to transport option for the mobile music listener - Up to 80 hours of battery life means that you'll be enjoying your music in peace for longer - Active noise cancellation on the Sony Noise Cancelling Over-Ear Headphone reduces ambient noise by up to 95% What's in the Box: - 1 x Entry Noise Cancelling Over Ear Headphones