Opposing magnets keep the 3/4-pound black sphere floating above the base, and the speaker unit housed inside is rechargeable—pull it from the floating base and plug it in, and a full charge gets 15 hours of playback. Photo 2 of 3 in Wireless Speaker That Levitates by Alexander George

Wireless Speaker That Levitates

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Opposing magnets keep the 3/4-pound black sphere floating above the base, and the speaker unit housed inside is rechargeable—pull it from the floating base and plug it in, and a full charge gets 15 hours of playback.