The power of iron efficient heater is use the resonance theory ,Pulse frequency transfer of space technology and large-capacity high-speed switch,which combines elements of high-tech products.The main circuit use the IGBT products,so reformed electronic oscillation characteristics of the older generation of high-frequency equipment fundamentally.Apply to all occasions of 20cm below the welding section.Small metal parts heat treatment such as small gears, shaft.Metal smelting,such as melting gold, and silver.