... can access TV,computer,VCD, DVD,etc-player HI-FI Speaker mp3 mp4 dvd TV PC CD Wireless HeadphoneModel number ... receive the sound wirelessly from any electrical device with audio output such us TV,PC,DVD,VCD, ... .Wired net chat:there will be audio cable with mic, insert it to the headphone and computer ... Noise Radio>50db 6.Distortion<2%THD 7.Speaker:40mm mylar 8.Frequency Response:20-20000Hz9.Transmission ...