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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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For KOSS KPH40 Restrospekt Gauss Small Steel Headphone with Microphone Wired 3.5mm Headphone Music Headphone Fashion Retro - AliExpress
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Amazon.com: Koss KPH40 Utility On-Ear Headphones, Detachable Interchangeable Cord System, Retro Style, Ultra Lightweight Design (Stealth Black) : Electronics
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