The MDR-HW300K 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 MDR-HW300Ks 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.