I had two of them that went up in a building fire (not my fault). I loved those little migs. Not the most powerful but extremely user friendly. On the machine there was only two knobs One to select between weld or stitch and the other for steel or aluminum. The gun had a potentiometer for wire speed and the machine chose the volts. That was a very handy feature when you are already out of position and need to make a change or make a change on the fly. I've never found a replacement with gun controls.
