... to work as DC TIG, pulse TIG, AC square-wave TIG, AC pulse TIG and MMA2. Adopting soft switch technique, high efficiency, small in size ... passive power factor correction, and high in power factor5. Easy arc starting, stable welding arc, high quality welding6. Suitable for welding carbon steel, copper, titanium ... -200HzOverall dimension(mm)571*350*580 Inverter AC DC Pulse TIG welding machine