Features This module is a finished transformer/booster module for small scientific productions It can produce high voltage pulse current, small size and high efficiency The input voltage is 3.7-6V DC and produces a high voltage of 400KV DC. It can be used for negative ion generators, electronic instruments and scientific experiments The peripheral circuit is simple, just connect it to the switch and battery, and the discharge intensity is excellent Features: This module is a finished transformer/booster module for small scientific productions. It can be spent high voltage pulse current, small size and high efficiency. The input voltage is 3.7-6V DC and produces a high voltage of 400kV DC. It can be used for negative ion generators, electronic instruments and scientific experiments. The periphery. The circuit is simple, just connect it to the switch and battery and discharge. The intensity is great. Features: Input voltage: DC 3.7 V ~ 6 V. Input Current: 0.5A ~ 1A Input cable length: approx. 4 cm Red wire: positive input Yellow wire: negative input High voltage type: pulsed direct current Output voltage: approx. 400kV (caution) Output current: 0.5A ~ 1A Output cable length: approx. 5cm Arc length: 1.5cm ~ 2cm Recommended power supply (not included): single 3.7V lithium battery or two 18650 batteries, one phone battery (>2000mAh, the protective panel should be removed), one NiCd/Ni-MH battery, one 4V or 6V Pb-acid battery (6 V can be provided) . best effect) Package Includes: 1 x High Voltage Generator Package List