Full-Bridge Inverter Soft Switch Control Technology, Double IGBT Modules, and Quick Recovery Diode Module; Undervoltage, Overvoltage, Overcurrent Protection; Gouging / MMA / LIFT TIG; Arc-Force Adjustable; Hot Start Adjustable; Anti-stick; VRD ON / OFF; Wired Remote ON / OFF; Long Welding Cable: up to 100m; Adopting Multiple Insulation Materials to Protect PCB and Main Circuit.