... by pedal control 1 year warranty Portable Portable AC DC Pulse TIG Welder1,Digital display,2T/4T trigger.AC ... /DC,current can be adjusted by pedal control2, be ... stainless steel, copper , titanium and non-ferrous metal with DC TIG,aluminum alloy welding is available by AC function3,small ... -90Welding thickness(mm)0.5-12 Portable AC DC Pulse TIG Welder-WSME200