Self-contained, hand-held Tesla coil produces a high voltage at a high frequency. Coil can be used to light fluorescent bulbs, spectrum tubes, and incandescent bulbs without wires or touching! The heavy-duty case is a convenient handle. The 2" electrode has an output between 10,000 to 50,000 volts at a frequency of approximately 500 kHz. The intensity of the 1" spark is adjustable by a knob on the end of the unit. Unit is designed for intermittent use and must be turned off to cool after ten minutes of use. AP5443 is equipped with an ON/OFF momentary switch in the handle for improved safety.