Sony Wireless RF Headphone, Black

Untangle your mind and relax with crisp, personal audio without wires. They also feature a comfortable headband and long battery life up to 25 hours. Best of all, one simple setup is all it takes to achieve optimal RF signal reception and you're on your way to cordless freedom. General information manufacturer Sony corporation: general information manufacturer part number mdrrf985rk: general information manufacturer website address Sony: general information brand name Sony: general information product model mdr-RF985rk: general information product name wireless stereo headphone system: general information product type headphone: miscellaneous package contents wireless stereo headphone system Rechargeable Lithium-Ion rechargeable battery: warranty limited warranty 1 year: technical information connectivity technology wireless: technical information wireless technology rf: technical information wireless operating distance 150 ft.: technical information sound mode stereo: technical information minimum frequen...