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Amazon.com: Koss Porta Pro KTC Ultimate Portable Headphone for iPod, iPhone and iPad: Home Audio & Theater
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Amazon.com: Massdrop x Koss Porta Pro X On-Ear Headphones — Noise-Cancelling in-line Microphone, Activate Voice Assistant or Skip Tracks with in-line Remote, Collapsible for Maximum Portability (Midnight Blue): Electronics
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