The high-voltage module is designed based on electromagnetic principles and outputs high-voltage pulse current. It features a compact size, high efficiency, and a simple peripheral circuitonly requiring a switch and battery to operate. The discharge performance is strong. This 20kV boost converter module operates with a power supply such as a single 3.7V lithium battery or two in series, including 18650 batteries or recycled mobile phone batteries (protection board must be removed; capacity above 2000mAh is recommended). Input voltage for the arc generator is DC 3.66V, with an output of DC 20,000V high voltage. Wiring connections: red wire for positive input, green wire for negative input. Output connections: use same-color cables on the opposite side. The 20kV step-up module can be used for educational science projects, electronic devices, ion generators, or as a high-voltage source for small-scale experiments. Avoid operating the high-voltage module without a load. Maintain an appropriate distance between the high-voltage output lines when powered. Battery capacity directly affects arc distance and performance (optimal results require sufficient current, not just maximum voltage). Color: Black Material: Metal Package Contents: 3 x High Voltage Transformers Note: Lighting conditions and monitor settings may cause slight variations in color representation. Measurement may vary by 13 cm.