1.TIG welding, MMA welding 2.Pulse, square-wave, 2T/4T 3.IGBT, Digital, save 10 group parameter 4.Pass CCC, CE. Features: 1. ... Adopts advanced digital control IGBT inverter technology, usd microprocessor for precise control It is easier to operate welding ... 10Pulse frequencyHz0.1-500Overall dimensionsmm420×260×290Weightkg16.5 DC Pulse TIG welding machine( 200A, Pulse, IGBT)