Sony MDR-RF4000K Digital RF Wireless Headphones

The MDR-RF4000K headphones from Sony provide high-quality audio without the hassle of wires, ideal for use with televisions and home entertainment systems. The headphones use digital RF technology to send audio to the headphones at distances as great as 100' (30m). Simply connect the included transmitter to your television or home theater receiver, and enjoy your favorite shows and music.