IGBT INVERTER TECHNOLOGY MUILT FUNCTION AC/DC TIG, DCMMA,DC PLASMA CUT QUALITY RELIABLE AND EASY FOR OPERATION INPUT POWER SUPPLY: 220/230/240V,50 ... ):0.5-25HZSP VALUE:30-70%AC FREQUENCY:20-100HZ( 50-250HZ OPTIONED) FOR AC TIGHF ARC START FOR TIG &PLASMA CUT, PILOT ARC ... FOR PLASMA CUT,ARC FORCE FOR MMA2T/4T AND PULSE ...