MIG function:no gas iron welding, 0.56mm iron and mild steel plate? TIG function:Argon gas stainless steel welding, Lift TIG welding 14mm stainless steel plate? ARC function:no gas iron welding, 2.5mm acid electrode? Full-digital control system to realize precise control and stable arc length during welding. Great reduction in metal loss obviously enhances the welding efficiency and energy saving effect.