The high-voltage module is designed using coil principles and outputs high-voltage pulse current. It features a compact size, high efficiency, and a simple peripheral circuit—only requiring a switch and battery to operate. The discharge intensity is approximately 20kV. This step-up 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). The arc generator operates with an input voltage of DC 3.6–6V and delivers a DC 20,000V high-voltage output. Input wiring: red for positive, green for negative. Output wiring: connect same-color cables on the other side. This 20kV boost module is suitable for high school science experiments, electronic devices, negative-ion generators, and as a high-voltage source for small-scale scientific use. Avoid operating the high-voltage module without a load. Maintain an appropriate distance between high-voltage output lines. The battery capacity affects the arc distance and performance (sufficient current supply is essential—not just maximum voltage). Color: Black Material: Metal Package Contents: 3 x High Voltage Transformers Note: The package includes only the items listed. Other products are not included. Due to lighting and display differences, the actual color may vary slightly from the image. Measurement may vary by +/- 1–3 cm.