Features: Generates 5KV-20KV from single 4.2V 18650 battery, suitable for igniting and industrial experiments with lab test parameters Coils and circuits are used to realize the stable conversion from low electricity to high electricity, with strong discharge and fast response. Support 3V to 4.5V input, adapt to various power supplies, and recommend 4.2V power battery, which is convenient for portable application. Potting process and shell protective to prevent short circuit and damage; designed at low temperature, which reduces the operational risk. The frequency is adjustable and distance is stable, which is suitable for igniting, experimental demonstration, education and scientific research. Specifications: Component:Metal Size:Approx.60mm/2.36inch Input: 3V-4.5V Input current: 1.5A-3A Output: 5KV-20KV (corresponding input electricity: output 5KV at 3V, output 20KV at 6V) Package Includes: 1 Set Igniting Module note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.