Advanced IGBT inverter technology, energy saving, stable output. With closed loop feedbacks, stable output voltage, good resistance, and performance to voltage fluctuation. Electronic reactance design and inductance adjustment can control the arc force effectively with less spark, deep bath, and beautiful welding seam. With 2T/4T, can reduce the fatigue of the welder Finishing welding protection, the welding will fill the crater by itself while finishing welding makes the seam look wonderful. External adjustment of voltage & current of ending current, ensure good welding performance. O.C.& O.H.Protection, for long-term use. With an External wire feeder, Expand the operation fields, reducing the fatigue of operating. Capable of Operating in a high or narrow place. Special design for the boat manufacturing industry, automobile manufacturing industry heavy-duty machinery manufacturing industry and so on.