Enjoy listening to music without annoying cables. These Sony WH-XB900N blue wireless headphones will impress with their comfortable design. Their ear-covering design ensures perfect insulation against ambient sound. The Sony WH-XB900N blue Wireless Headphones have Bluetooth technology to connect to your devices. Say goodbye to annoying cables. Easy, intuitive wireless pairing with other types of electronics is enabled with NFC technology. With a frequency range of 20 to 40000 Hz, you will know that you won't miss a single beat of your favourite song. These wireless headphones even include a microphone. Thanks to active noise cancellation, nothing will disturb you. If you often travel, then you will be sure to appreciate the folding construction of these wireless headphones. A fully charged battery will be able to last 35 hr(s).