... headphone 1,wireless listening function 2.FM RADIO 3.wireless headphone for TV,PC,DVD ... ,VCD,MP3/MP4 and CD pl FM RADIO wireless headphoneFunction:1.Wireless headphone1,wireless listening function: ... MP4 and CD player2,FM radio:The headset can be used as FM radio separately, search and lock channels ... distance > 30meters(360 degree) 5.Signal-to-Noise Radio>50db 6.Distortion<2%THD 7.Speaker:27mm mylar ...