Product Description Inverter AC/DC Tig and Mma Welder (WSME-160 WSME-200 WSME-315) Four workng modles in one: AC square wave TIG welding, DC TIG welding, pulsed TIG welding, DC MMA welding. Multiple functions. Specifications can be adjusted precisely. Aluminum welding penetration and deoxygenating are adjustable. Easy arc igniton, stable electric arc, and good welds. Suitable for stainless steel, titanium, copper, aluminum alloy and other metals welding.