Hello, I have a brand new pair of Sony MDR-RF985RK Wireless TV Stereo Headphone System for sale. They are open box and have never been used. This model is no longer manufactured. Please let me know if you have any questions. Check out my other items. Audio In : Analog Phono Input (left/right), Analog Stereo Input mini jack (x1). (1.0 m) Stereo connecting cable. Headphones: Approximately 10.59 oz. (300 grams) Including supplied batteryTransmitter: Approximately 7.7 oz. Battery Charging (Approx): 16H (to fully charge an empty battery); Battery is charged by placing MDR on TMR Battery Life (Approx): 18H (with fully charged supplied NiMH battery pack); 28H (with AAA type alkaline battery). Cordless Headphones Enjoy high-fidelity sound, at home, in wireless freedom. Long-term comfort The easy-adjust headband allows for long-term comfort and ease-of-use. Expressive sound 40mm drivers deliver deeper bass and audio clarity for a superior home entertainment experience. Quality sound Wireless radio-frequency transmission provides quality indoor transmission. (Up to approximately 150 ft) Fast charging Quick charging your headphones is a breeze with the secure charging system. A 3.5 hour charge will produce a full charge of approximately 25 hours. Other specifications Design: Over-the-head, Home-music/movie/games Diaphragm: PET Headband: Wide, Easy-Adjust Magnet: Ferrite Power On/Off: Power turns ON when headphones are worn; Red LED illuminates Type of Use: Home Communication: Wireless Analog 900 mHz Radio Frequency Headphone Type: Closed, Dynamic Audio Audio Modes: Mute: Operates when RF signal is weak or not received Channel Selection: Select by a slide switch Effective Range: Approximately 150 feet (45 m) Transmitter: Ch1: 915.5 MHz, Ch2: 916.0 MHz, Ch3: 916.5 MHz selective, FM Stereo Tuning: Manual tuning via switch on both base and headphones Volume Control: Yes (Rotary) Battery Type: Rechargeable Ni-MH battery pack (supplied); AAA x2 (not supplied) Internal Power Supply: Transmitter: Supplied AC adapter (12V, 200mA) Power Requirements: Rechargeable nickel-metal hydride battery (supplied) or commercially available (size AAA) alkaline batteries. Enjoy high-quality wireless audio with the Sony MDR-RF985RK headphones. These over-the-ear headphones come with a rechargeable battery that provides hours of uninterrupted playback. Their leather cushions and adjustable headband ensure a comfortable fit for long listening sessions. Featuring Bluetooth and RF technologies, these headphones are perfect for home use, travel, and more. They boast noise cancellation and isolation technologies that keep out unwanted background noise, while their stereo sound ensures a premium audio experience. With built-in volume control, channel monitor, and on/off switch, these headphones have everything you need for a great listening experience.