You can play the chips on a Micro Player, which comes with a single earplug (perfect for discreet classroom use).

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Wethersfield High School of Wethersfield, Connecticut won the competition this year for their device called the Earplug Chain Fixture.

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I've run with it twice now and although it was nice to have the music, the right earplug simply refuses to stay in.

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They've put advertising on their vending machines and even on the tiny earplug plastic case, along with marketing schemes using mobile phone codes to direct consumers to web sites to view more products.

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