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SB42 USB Communication Headsets - Koss Stereophones
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CS200 USB Communication Headsets - Koss Stereophones
Koss CS100 USB - Double-sided Electret noise-cancelling Mic - Walmart.com
Koss CS100 Dual Plug – Thomann United States
Koss CS100 USB 8' Wired Communications & Gaming Headset w/ Noise Reduction Mic | eBay
