... 1 year warranty Portable Portable AC DC Pulse TIG Welder1,Digital display,2T/4T trigger.AC/DC,current can be adjusted by pedal ... steel, copper , titanium and non-ferrous metal with DC TIG,aluminum alloy welding is available by AC function3,small size,light weight ... current(%)10-90Welding thickness(mm)0.5-12 Portable AC DC Pulse TIG Welder-WSME200