ITEM NAME:Boost Step-up Module High-voltage Generator Converter DC3.7v-7.4v to 400KV AS!E Features: The high-voltage module uses the principle Tesla coil is made of high-voltage pulse output voltage Current, small size , high efficiency, simple external circuit ( just plug in the switch , the battery can be ) Discharge intensity violent. Specification: Voltage: Input DC3.7-7.4V, output DC400kV - 600KV( Please note that when security ) High Type: Pulse Current High voltage bipolar discharge distance: 10mm-20mm Output voltage lines Length: about 100mm Input power cable length: about 10mm ( red is positive ) Dimensions: Φ24 * 64mm About Power : 3.7V Li-ion battery can be used single or two series , such as 18650 , idle cell phone batteries ( to remove the protection board , the proposed capacity of 2000mAh or more ) or NiCd / NiMH battery pack , 4V or 6V Lead Acid batteries. This module is a small production with high-pressure science inverter 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 making small science . Note: Avoid high-pressure high-voltage module load electricity use . Must adjust the high voltage side suitable distance ( before electricity, battery voltage and capacity is proportional to the distance from high-voltage arcing used when testing the arc distance from short to long experiment , prohibited from beyond the arc when.1x 3.7-7.4V to 400kV Boost Step-up Power Module. If so you can 6V maximum power output. Current, small size, high efficiency, simple external circuit ( just plug in the switch, the battery can be ).