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Amazon.com: Sennheiser PMX 680 Sports Earbud Headphones (Discontinued by Manufacturer) : Electronics
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Sennheiser Adidas Sports PMX 680i 3.5mm, Straight Connector Earbud Earphone Headphones & Accessories - Newegg.com
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Amazon.com: Sennheiser PMX 680 Sports Earbud Headphones (Discontinued by Manufacturer) : Electronics
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