Features: This 400KV high electric converter generates of thousands of from 3.7V 6V input, ideal for science experiments and powering ionizers through coil technology. small modules features color terminals for fast battery connection and pulsed generation, requiring minimal wiring for immediate operation. Perfect for STEM educators, electronics hobbyists, and high school students conducting safe electrical demonstrations or development. Enables hands on learning in physics lab, DIY science projects, and easy carry device testing requiring controlled high electric outputs. suitable for 18650 batteries (2000mAh+ recommended), this strong converter maintains stable performances through 10 second operational cycles with proper safety protocols. Specifications: Component : plastic Length: about 64mm/2.51inch Package Includes: 1xBoost modules note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.