Item Description Features: The high voltage module uses the principle of the Tesla coil is made of high voltage pulse output voltage current, small size, high efficiency, simple external circuit (just plug in the power switch, the battery can be) discharge intensity violent. < br /> Specification: Voltage: Input DC3.6-6V, output DC400kV - 600KV (Please note that in case of safety) High type: Pulse current Bipolar high voltage discharge distance: 10mm-20mm Output voltage leads Length: about 100mm Input cable length: about 100mm Dimensions: Φ24 * 65mm Input leads: Red and green power connection red line: & quot; + & quot; green line & quot; - & quot; About power: 3.7V Li-ion battery can be used in one or two series, such as 18650, idle phone batteries (to remove the protection board, the suggested capacity of 2000mAh or more) or NiCd / NiMH battery packs, 4V or 6V lead-acid batteries. This module is a small production of high-pressure science converter transformer / booster finished module, the input terminal DC3V-7.2V voltage can get 200,000 volts DC high voltage (about 1-2 cm arc) at the output can be used as high school science experiments, electronic equipment, negative ion generator, high voltage source to use when doing small science. The package includes & nbsp; & nbsp; & nbsp; & nbsp; ● 1x 3v-6v to 400kV Boost Step-up Power Module