Sony MDR-DS6000 Wireless Surround Digital 2.4GHz RF (Discontinued by Manufacturer) Digital Wireless Headphones For Home Audio System Easy Connection To Tv, Pc, Dvd Or Vcr Players Virtual 5.1 Channel Surround Sound Digital Wireless Signal Travels Up To 95 Feet 2.4 Ghz Rf Digital Transmission 2.4GHz RF Digital transmission 2.4GHz RF Digital transmission Virtual 5.1ch surround sound Auto tuning, power on/off, recharge CD sound quality and low noise level