... functions in one machine: MMA120+TIG120+CUT30, CAT312 is 220V, CAT312D is 110V/220V Inverter DC TIG / MMA / Plasma Cutting 3-In-1 ... , and low cost3.Three functions in one machine, TIG welding, MMA welding and air plasma cutting4.Compact and easy for operation5."D ... .Complete accessories: welding torch, welding cable,earth clamp, welding holder, cutting torch,carton box