... -press in the panel, single knob adjust stepless, digital display show kinds of functions clearly, can be convenient to set welding parameter ... parameter can be loaded easily.4. Satisfied AC/DC TIG welding, mix AC/DC TIG welding, MMA welding, and so on.5 ... for welding stainless steel, carbon steel, copper, aluminums and titanium. Digital IGBT Inverter AC/DC Pulse TIG WSE-315D welding machines