Description: 1.High speed dual inverter to control the current waveform, very high arc stability, high quality AC square wave, decreases the welding cost and increases the welding quality. 2.The multipurpose welding machines in the series can be operated for DC TIG, AC TIG, pulse TIG welding processes. 3.Inverter high frequency, high efficiency, low noise. 4.High frequency and high voltage arc initiating, high success rate. 5.With the perfect protect functions in over voitage,under voltage, over heat, over current, over load, be safe and reliable. 6.Be able to weld mild steel, stainless steel, copper and titanium metal etc. by DC TIG, also be able to weld aluminum and aluminum-alloy by AC TIG.