• that connect to phone:not only a teaching tool, but a multi-functional for viewing, great for your choice, transmission system
• Electric arc generator:small size but practical in use, turn the sound slowly to avoid being shocked by the large sound of the arc,science desktop
• Electrical discharge machine display:no electrical appliances can be placed around when it is turned on, it forms and when turning on, for
• Solid state :the electric arc generator adopts design, no grounding needed and no audio wire connection,beat electron
• electronic :you only need to twists an electric-pin and plug-in the power sources to experience the charm of electrical discharge,music coil