Feature: 1. This module is a high voltage generator made of the circuit composed of components and high voltage transformer, which can be used as a high voltage source for student science experiment, electronic instrument, negative ion generator, etc. 2. Based on the Tesla coil principle, the module outputs high-voltage pulse, featuring small volume, high efficiency and fierce discharge intensity. 3. The module is divided into input end and output end. The red and green wires are the input end, and red one is positive pole, green one is negative pole. The output end is two high voltage wires in the same color. High voltage arcs can be generated by connecting the input end to the battery. 4. Can be uses with 3.7V lithium battery (such as 18650 battery), NiCd / NiMH battery pack, 4V or 6V lead-acid battery, etc. Input voltage current affects output voltage and arc distance. 5. Avoid power-on when no load under high voltage. The distance of high voltage discharge end should be adjusted properly before power-on, and the arc distance of the output end is proportional to the voltage and capacity and the used battery. 6. The arc distance should be tested from short to long. It is strictly forbidden to exceed the maximum arcing distance of the module. Because the high voltage energy cannot be released, the module is easily damaged. 7. The module has high power and inner heat dissipation is not good, so it can not work for long time. 8. The small-capacity lithium battery is connected in series at 7.2V, and the voltage measured in the arc discharge state has dropped to about 4V. The smaller the battery has, the lower the voltage is. Therefore, it is recommended to use more than 2000MA lithium battery, and it is better to choose 4000MA above battery. Specification: Item Type: High Voltage Pulse Generator Module Model: MC-901 Item Size length 88.5mm / 3.48in, diameter 26mm / 1.02in, section 24mm / 0.94in Input Parameters: 3.7-7.4V/4A Input Wire Length: About 10cm / 3.94in (red positive, green negative) Output Parameters: 800-1000KV/0.5A Output Wire Length: About 16cm / 6.3in Discharge Distance of High-Voltage Two-Pole: 1.5cm-2cm (do not exceed) Package List: 1 x High Voltage Pulse Generator