The high-voltage module is designed using coil technology to generate high-voltage pulse output. It features a compact size, high efficiency, and a simple peripheral circuit—only requiring a switch and battery connection to operate. This 20kV boost module can be powered by a single 3.7V lithium battery or two in series, such as a recycled mobile phone battery (remove the protection board; capacity above 2000mAh is recommended). Input voltage for the arc generator ranges from DC 3.6–6V, with an output of DC 20,000V. Input wiring: red for positive, green for negative. Output wiring: connect same-color cables on the opposite side. This 20kV step-up module is suitable for educational science experiments, electronic devices, negative ion generators, and high-voltage power sources for small-scale scientific use. Avoid operating the high-voltage module without a load. Maintain an appropriate distance between high-voltage output lines. The arc performance depends on battery capacity and current delivery, not solely on voltage. Color: Black Material: Metal Package Contents: 3 x High Voltage Transformers Note: The package includes only the items listed. Other accessories are not included. Lighting and display settings may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1–3 cm.