Multifunctional Electronics Audio Tesla Coil Module Plasma Speaker Sound Solid Science Experimental Toy with BT

Features:
Desktop-level integrated mini solid state Tesla coil finished product, made of PCB, highly integrated, cleaning and safe.
Square-wave audio can be played to increase its playability.
It is a perfect teaching tool to spark students' interest of science, also can be a fine gift.
You only need to twists an electric-pin and plug-in the powersource to experience the charm of palms-lightning.
Direct current power adapter, no other accessories, no grounding needed.
With heat dissipation system, it is safer.