Features This module is a finished module of transformer/booster for small scientific production It can output high voltage pulse current, small size and high efficiency The input voltage is DC3.7-6V DC and will output 400KV DC high voltage It can be used for negative-ion generator, electronic instrument, and science experiment The peripheral circuit is simple, simply connect to switch and battery, and the discharge intensity is great Specifications: Input Voltage: 3.7V~6V DC Input Current: 0.5A~1A Input Wire Length: About 4cm Red Wire: Input positive Yellow Wire: Input negative High Voltage Type: Pulse direct current Output Voltage: About 400KV(be careful) Output Current: 0.5A~1A Output Wire Length: About 5cm Electric Arc Length: 1.5cm~2cm Recommended Power Supply(not included): Single 3.7V lithium battery or two batteries, phone battery(>2000mAh, protection board should be removed), NiCd/Ni-MH battery pack, 4V or 6V Pb-acid battery(6V can provide better effect) Note:  1, Output ends of cable should be adjusted properly before power on, and the arc distance depends on battery voltage and capacity. 2,  The arc distance should be from short to long, do not produce a longest arc at first or the module might be damaged easily. 3, The module has high power and inner heat is not easily dissipated, so it can not work for long time. 4, The way to judge if a battery capacity is enough to output maximum power is to measure the battery voltage when producing arc. It the measured voltage is about 6V, then it can output maximum power. Package Includes: 1 x High Voltage Generator Package List