Premium sound quality with industry-leading NC. Improved new algorithm with HD noise cancelling processer QN1 and New Bluetooth chip Enjoy upscaling music with DSEE extreme. Frequency Range-2.4GHz band 2.4000GHz-2.4835GHz Dual noise sensor technology, featuring two microphones on each earcup, captures ambient noise and passes the data to the HD Noise Cancelling Processor QN1 Enjoy the speak-to chat function along with ambient sound control and wearing detection Improved wearing comfort with redesigned headband shape with slimmer head cushion and finer tuning of band curve Adaptive Sound Control automatically adjusts to your location and behaviour. It is a smart function that can learn to recognise locations you frequently visit, such as your workplace or favourite café Quick Attention-Need to quickly hear voices or sounds around you? Just place your hand over the housing to instantly turn your music volume down and let ambient sound in All day power and quick charging-With a huge 30 hours of battery life you’ll have enough power even for long trips. And if you need to top up in a hurry, you can get 5 hours’ worth of charge after just 10 minutes with the optional AC adapter.