1. DIY kit: This electronic mini coil plasma speaker kit is a DIY kit that allows you to assemble the components yourself. It offers a handson experience and the satisfaction of building your own speaker. 2. Resonance principle: The coil in this speaker kit is a transformer that works on the principle of resonance. It was invented in 1891 by Serbian scientist Nikola. It produces ultra voltage, but low current frequency AC. It has been used in various experiments and applications such as electrical lighting, fluorescence spectroscopy, Xray, electrotherapy, and radio energy transmission. 3. Function: The rear end of the coil produces one at full energy. This can also be used for ignition purposes and gives your speaker a visually stunning effect. 4. Separator lamp function: When the coil is powered, it can light up a fluorescent lamp and add an additional visual element to your speaker setup.