JVC HA-W1000RF Wireless Surround Headphones (Discontinued by Manufacturer) 900 MHz Cordless Surround Sound Headphones with Trubass and WOW processing Rechargeable power supply with Ni-Cad Batteries included Transmitter automatically turns on or off with audio signal Use with any audio/video equipment. Frequency Modulation System for reception through walls or obstructions Cordless Convenience. Easy rechargeable system