1. Pulse AC DC TIG welding, mix AC DC TIG welding, MMA welding. 2. Solf key and digital display ... panel, single knob adjust stepless, digital display show kinds of functions clearly, can convienient to set welding parameter;2.Satisfied AC/DC TIG ... welding, pulse AC/DC TIG welding, mix AC/DC TIG welding, MMA welding, and so on ...