The QZ77 Earset features both Active Noise Reduction (ANR) and Passive Noise Reduction (PNR) technology which eliminate harmful and unwanted noise while still providing the ultimate in stereo sound. For years we have been striving to improve on the... more
Product Description Koss 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 noisecanceling microphone... more
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