• Science --with transmission function, gaseous tube and kind of bubbles, electronic 2023
• Transmission system--no electrical appliances can be placed around when it is turned on, it forms and when turning on,
• models for adults--the electric arc generator can play music in better than arc loudspeaker, electronic for
• Desk experiment --with circuit protection design, and it will not damage the input device, professional to use, that connect to phone
• Electric arc generator--you only need to twists an electric-pin and plug-in the power sources to experience the charm of electrical discharge,music coil