IGBT Zx7-200 DC Inverter Mma Arc Welder Welding Soldering Machine Aofeng 220 Volt AC Adopt IGBT inverter technology to reach high reliability and stability High inverter frequency, energy-efficient; Structure is small, firm, knock resisting and antitrust Quick arcing, little spatter, stable current, good forming, good impulse automatic offset function Suitable for all kinds of acid, alkalic electrodes Widely used, suitable for working at Heights and field, interior decoration industry, all kinds of mechanical material