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Koss Multimedia Stereo Headphone With Usb Plug (Sb45 Usb)Product DescriptionKoss SB45 USB Full Size Over-Ear Communication Headset deliver a full range of sound that enables you to not only hear clearly, but also speak clearly. Featuring Koss Clear Voice Technology (CVT), the SB45 noise canceling microphone eliminates excessive background noise. Th..