It is just a Ready Welder and uses two batteries for power and they must be disconnected from the rigs and hooked up in series with the cables that come with the unit. You are then welding with 24 volt system and can weld 3/8. It even comes with a gas setup if you want to get fancy or use it at home. I just run .035 flux core on the trail and have a cart with two 12 volt batteries on a tender for home use. With one 12 volt battery you can weld light stuff like sheet metal.
They are pricey and seldom seen for sale used but I got lucky and found a new/used one for $250 but it took a lot of looking. I always carry it, really like it and have had no trouble with it....:standing wave: