1、Accuracy Processing: The use of accuracy processing, bottom shell protection, to prevent scalding, make the coil more refined. 2、Epoxy Resin Coating: Adopt the epoxy resin coating of the secondary coil to reduce the coil disconnection. 3、Heat Dissipation: Can work for a long time, has special heat dissipation device, a cooling fan and a reasonable circuit design, and the heat dissipation effect is good. 4、Easy to Operate: This is an easy to operate coil, non manual is required at all. Plug and play, non grounding required. 5、Perfect Teaching Tool: A perfect teaching tool to stimulate students' interest in science, and also a good gift. 1 x Base1 x Coil Head1 x Adapter1 x Plug1 x Wood Pole1 x Screw1 x Copper Wire1 x English User Manual Item Type: Wireless Transmission Experiment ToyMaterial: Alloy + AcrylicColour: GoldenAdapter Output Voltage, Current: 15V 8AArc Length: Approx. 10cm / 4inVoltage: 100-240VDC