100% New and High Quality Voltage within 9V can work for a long time continuous arcing for 1 day. When the voltage is longer than 9V, it is necessary to add heat to the fan. 5 ~ 12V power supply, available 2-3 18650 battery series power supply, or ordinary router power supply or 9V/12V power supply. Power must be supplied within the nominal voltage range for proper operation! If the voltage is too low, the module will undervoltage and stop working. Never reverse, overpressure, otherwise it will damage the module or even cause the capacitor to explode! This product poses a certain risk to non-professionals and must be operated in strict accordance with the electrical specifications! Note: This product is a semi-finished product without a shell. It is recommended that it be potted with paraffin or epoxy to improve durability. Specifications and parameters: Input voltage: 5V~12V Input current: 0.2A~0.5A Output voltage: 5KV~15KV Pulse capacitance: default 1000pF ( buyer can choice 100pF) Pulse frequency: 3~20 times/second Arc distance: 1cm~1.5cm Arc characteristics: white, low temperature 24 hours continuous arc, short / no load can be, high efficiency and low heat circuit design, no radiator! (If the voltage is not enough, up to 4 modules can be connected in parallel, the output terminals can be connected in series, and the arc can be increased by 4 times) Package Included: 1 x Boost Coil Module 100% New and High Quality The product has no casing, it is recommended to use the potting before use (the transformer part has been sealed) to improve the durability. Default send one board. as the third main photo shows. Specifications and parameters: PCB size : 20*50mm Power: