The Original American Stereophone Company ,Ever since we invented the world's first SP/3 stereophone back in 1958, Koss Stereophones have been bringing back the excitement of a live performance. Music lovers around the world recognize that dedication to accuracy in sound reproduction as The Sound of Koss. , ,Koss SB45 USB Full Size Communication Headsets deliver the full range Sound of Koss allowing you to hear and speak clearly. The Koss Clear Voice Technology, or CVT, allows the SB45 USB noise-reduction microphone to eliminate excessive background noise. This enables the PC voice applications, such as speech recognition, to be used much more easily. , ,The SB45 USB effortlessly collapses into a compact form for easy storage or on-the-go transportation. Just simply collapse the SB45 USB into its compact form for when you want the comfortable Sound of Koss wherever you are