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(More customer reviews)This is a neat little Tesla ball. It plugs into your USB, and is small so it doesn't take up room, but big enough to play with. If you get a USB AC adapter, it can plug into your wall too.
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Fascinating and fun. USB Plasma Ball is fascinating to watch and even more fun to play with -- just place your fingers on the glass surface and watch when colored "bolts" of glowing light follow your every move as electricity seeks a ground. Powered by your computer's USB port. 6 inches tall, base approx. 4 inches diameter.
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