Produces a 20,000 volt 1" open-air spark discharge. On board switch allows selection of a high or low energy setting of 180 and 5 millijoules of spark output energy respectively. Repetition rate is 3 or 30 pulses per second. Input and output have wire leads for easy connecting. Intended for triggering spark gap switches for high-speed coulomb energy transfer, igniting flammable gases and atmospheres. Operates from internal/external 12V batteries or wall adapter for standard 115VAC power (not included). Ground referenced output circuit provides convenient interfacing to most three terminal devices. Assembly is 7 x 1 ½" board level construction. Kit is an easy to assemble kit with printed circuit board. Ready to use is board level assembly with connecting leads.