Sony Wireless Noise Reduction Hi-Fi Stereo Headphones The Wireless Hi-Fi Headphones from Sony allow you to listen to your music wirelessly in up to a 98-foot range. They feature 40mm drivers and a Neodymium magnet, and are powered by a built-in rechargeable battery that provides up to 10 hours of playback per charge. For a comfortable fit, the headphones have a slider headband design and pressure-relieving ear cushions. The Headphones are also compatible with wired sources, and have a 1/8-inch stereo input. A USB charger cable, connection cable, and AC power adapter are included.High quality signal and soundThe Sony wireless headphone system transmits an uncompressed 2.4 GHz signal to reduce unwanted interference while the real-time automatic channel tuning prevents signal degradation. These features allow the system to deliver high quality sound without outside interferenceEnjoy broad frequency responseThe large 40mm driver units with neodymium magnets deliver broad, balanced, and accurate sound for an exceptional wireless listening experience. You can enjoy 20 - 22,000 Hz frequency response when listening wirelessly or extend the bass frequency response even further from 10 – 22,000 Hz when connected using the supplied audio cableLong battery lifeThe built-in, rechargeable Lithium-Ion battery provides up to 10 hours of continuous playback on a full charge. The Sony headphones can even be used while charging using the included micro-USB cable, full charging capacity takes approximately 3 hoursPassive listening modeEnjoy the convenience of passive mode, enabling you to use the headphones in a conventional corded manner with the included stereo cableDesigned for comfortThe Sony wireless headphones not only sound great, but they are also extremely comfortable and stylish thanks to their light-weight, adjustable padded headband and swivel style ear-cup design