Features: This 15KV ignitions coils module combines modulars with high efficiency inverters technology, delivering stable 15KV output for demanding applications while maintaining 92% energy conversion efficiency. Features wide voltages input compatibility (3.7V-4.2V, expandable to 12V) with advanced high frequency circuitry, housed in metal plastic construction for heat dissipation and electrical insulation. for DIY electronics enthusiasts, automotive technicians maintaining generator systems, and industrial engineers requiring precisions high voltages. for automotive ignitions system upgrades, industrial equipment maintenance workshops, and scientific laboratories conducting high voltages experiments. modulars structure enables easy customization with optional accessories, while the heat resistant metal casing and ABS housing ensure safe operations across temperature variations from 20°C to 85°C. Specifications: Materials: Metal + Plastic Size: 2.6x2.1cm/1.02x0.82inch Package Includes: 1Set Arcs ignitions Generator note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.