Sony Long Range Wireless Stereo Headphones with Wide Comfortable Headband, Volume Control and Mute Switch for all Sony KDL-40BX450, KDL-46BX450, KDL-55HX850, KDL-46HX850, KDL-46EX645, KDL-50EX645 & KDL-60EX645 LED LCD HDTV Flat Screen Television - Works Up To 26 feet Away Listen to and watch whatever you want, as loud as you like without disturbing anyone around you, while roaming freely around the room, without getting tangled up in a long headphone cord. A 26 foot direct transmission range, and a 13 foot 90 transmission angle range for uninterrupted listening enjoyment throughout. Infrared signals are resistant to external noise and interference, but the headphones must be within line of sight of the transmitter. The supplied rechargeable nickel-metal hydride battery lasts approximately 28 hours on a full charge and recharges automatically when you place the headphones on the supplied transmitter base station and charge via electromagnetic induction charging. Also has the option of using standard AA alkaline batteries. (Not supplied) Enjoy rich, powerful expressive sound thanks to powerful neodymium magnet driver units that provide crystal clear audio. Large 40 mm diameter drive units deliver deep rich bass, low distortion and a wide dynamic range. PET diaphragms ensure high rigidity for minimum distortion and sharp audio clarity for a superior home entertainment experience. Lightweight and comfortable so you can wear them for hours on end with self-adjusting, wide, soft padded headband and open-air design that allows you to continue to hear ambient sound. Power switch and Volume Control is mounted on the headphones with an ON/OFF LED Indicator light. The Mute feature operates even when RF signal is weak or not received.