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