Headphone In recent years, more and more sports program arises on tv, especially as the 2008 beijing olympic games is approaching, how to enjoy fantastic live without disturbing others becomes a world-wide social issue. And now, wireless headphone as a new concept steps into our view. What you need to do is just tuning the tv mute, and wearing the headphone , then you will possess your own private space, just enjoy yourself. Meanwhile, it is also suitable for the old who have disability in audition. Jh-810a vhf multifunction wireless headphone adopts auto scan technology to wireless transmitting and receiving signals from tv, mp4, psp, ipod, pc and any other audio devices without disturbing others or considering the limitation of the connection cables. It's transmission frequency is 85.5mhz and it's transmission distance can reach 50 meters. The whole item is composed of a transmitter and a receiver. For the receiver, it has wireless receving and fm radio function. 1. Wireless use for headphone. 2. Can be used at home or car, compatible with portable dvd, gps, tv, pc, etc 3. Fm radio function. 4. Wired use for headphone with microphone for talking on internet (only for jh-810a1) 5. High-quality stereo wired headphone(only for jh-810a1) 6. Transmission frequency : 85.50.2mhz 7. Transmission distance: 50 meters Colorful paper box