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The Theefun Plasma Ball is a 6-inch glass globe on a base that turns electricity into visible dancing filaments. It works two ways: touch the glass and the plasma follows your finger, or switch to sound mode and it pulses to music and noise above 80dB. It runs from the included 12V adapter, so there are no batteries to replace. It suits kids' rooms, desks and party decor, and it is a straightforward novelty lamp rather than a precision science instrument. Rivals in this size class often add USB power or remote control; this one keeps to a simple switch and adapter.
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This is a 6-inch plasma globe with a glossy glass sphere on a plastic base. Colored plasma filaments move inside the sphere, and they follow your fingers when you touch the glass.
It has a sound-activated mode. In this mode the globe lights up when it detects sound over 80dB, and it flashes and dims with music played above 80dB.
It runs on the included 12V power adapter and uses no batteries. Connect the adapter to the globe, plug it into an outlet, and flip the switch on the base. Do not touch it with wet hands, avoid prolonged direct contact with the sphere, and keep it away from high heat and metal objects while it runs. It is not for unsupervised use by minors.
