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Amazon.com: Koss UR20 Over-Ear Headphones, Flexible Sling Headband, Black : Stereophone: Electronics
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Amazon.com: Koss UR29 Collapsible Portable Headphones, Standard Packaging Black, Silver : Electronics
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Koss UR40 Lightweight Over-Ear Stereo Headphones for iPod, iPhone, MP3 and Smartphone - Silver : Amazon.co.uk: Electronics & Photo
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Amazon.com: Koss KPH40 Utility On-Ear Headphones, Detachable Interchangeable Cord System, Retro Style, Ultra Lightweight Design (Rhythm Beige) : Electronics
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