The Weldpro 200 Amp Inverter 3-in-1 multi-process dual-voltage welder is a synergically designed MIG (DC)/ Flux Core/TIG(DC)/Stick(DC) welder that takes the worry out of adjusting voltage and wire speed. The model Mig 200 automatically adjusts and compensates both voltage and wire speed together while at the same time allowing the user to fine-tune voltage independently if they so desire .