Jh-811a2 vhf multifunction wireless headphone Jh-811a2 vhf multifunction wireless headphone(5 in 1) is specially designed for pc and other audio/video devices users.It adopts auto scan technology to wireless transmitting and receiving signals from 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. Besides wireless listening and rm radio function, it has wireless talking on internet, wired use for headphone and baby monitor function.When wireless talking on internet function works, your voice signal will be transmitted from the built-in microphone of the transmitter to the pc, which makes your wireless chatting on internet come true. You no longer need to consider the limitation of connection cables from now on, jh-811a2 make you far away from radiation , away from fatigue. 1. Wireless headphone. 2. Fm radio function 3. High-quality stereo wired headphone 4. Wireless talking on internet. 5. Monitor function 6. Transmission frequency:85.5ía0.2mhz 7. Transmission distance:30 meters Colorful paper box