portable 110V and 220V welder with multifunctions: MMA, TIG,PULSE TIG,MIG,PULSE MIG,DOUBLE ... (110V and 220V)automatic recognize and self-switch over2).6 function in 1: mma,tig,pulse tig,mig,pulse mig and ... wire feeding methods for MIG welding: pull and push5).IGBT inverter power source and duty cycle up to 60%. 6).The ...