Block out unwanted noise with wireless noise cancellation on the WH-CH700N. To optimise the noise cancellation, press and hold the noise cancelling button and activate Artificial Intelligence Noise Cancellation (AINC) and adapt noise cancellation to your environment. Background noise is analysed and adjusted for optimal performance on aeroplanes and other noisy environments. Keep your music playing all day. A built-in Li-ion battery delivers up to 35 hours of power and is rechargeable via USB. Quick Charging gives 60 minutes of play back from 10 minutes of charge. Tune your headphones to your sound with the free Sony headphone connect app for android and iOS. Easily adjust audio levels and digital sound field modes with a range of pre-sets and customisable EQ settings.