1?��Easy To Work: No grounding, no instructions, install the secondary coil, plug it in, turn the switch on and it works. 2?��Normal Arc Mode: It can produce an arc up to 2 inches (50mm). If no arcing occurs, use an insulated metal contact discharge needle to successfully establish an arc. 3?��High Quality: The coil is separated from the base to ensure safe transportation. The intermediate circuit board is assembled from many small parts, neatly arranged, and takes about two hours to make. So please protect it and don't let it fall to the ground. 4?��Touchable: The arc can be touched at will, with only a slight feel and warmth, making it a very cool collectible and gift. 5?��Heat Dissipation: Beautiful appearance. The base is equipped with a high quality heat sink, which generates very little heat and does not require a cooling fan. The continuous working time of the test is 5 hours.