Mad Catz F.R.E.Q.7 Dolby 7.1 Headset - Red Ideal for use with gaming movies music and more the F.R.E.Q.7 features Dolby Headphone Technology and Dolby Pro Logic IIx technology expanding stereo and 5.1 audio to rich 7.1 surround sound perfect for empowering gamers with a competitive edge. In addition PC gamers can instantly toggle between surround sound and stereo to ensure they have the right audio for their game or music.