This machine is a ZX7-500 IGBT Inverter Manual Arc Welding Machine. It is a heavy-duty three-phase 380V electric welding inverter designed for industrial metal fabrication and repair work. It features adjustable welding current and thrust control, digital current display, and IGBT inverter technology for efficient, stable arc performance. It is suitable for welding steel structures, machinery, pipelines, and general fabrication applications.