Well, it is a constant currant/constant voltage power supply.
The only thing you can't do is hook up a feeder like a Suitcase 8/12RC, 22a, 60 series, ect.
It only supports volt sensing feeders, like mentioned earlier (8/12VS feeder). Basically, all that means is that you have to set voltage at the power source and wire feed speed at the feeder. If you use a WCC box, that will enable you to set voltage and wfs at the feeder. Depends on how much money you wanna spend on accessories/and or how lazy you are.
This machine stick welds, carbon arc gouges, and tig (lift arc or scratch start) very well. DC only, so no aluminum tig. Great price on this too! Glws!