This product is a classic spark gap Tesla coil.
Why do we call it classic? Because Nikola Tesla's original invention of the Tesla coil was constructed in such a way that a firing gap was used to trigger the operation of the resonant circuit.
It was this form of Tesla coil before semiconductor devices were created at that time.
Supply voltage : 110 - 240V AC 50/60Hz To 9V 3A DC
Power : 20W
Lightning length : 5CM （Adjustable）