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10 Electricity-Free iPhone Speakers

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eco amp
credit: eco-made

eco-amp

The eco-amp is made from 100% FSC certified post-consumer recycled fibers. It comes as a flat piece of paper that you can fit into a pocket or backpack until you get to where you want to set up your music. You then fold it into a cone and have an instant electricity-free amplifier for your iPhone.

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