I could buy the welding device from the circle of acquaintances more than cheaply. Because the owner has passed away. The part is new and unused. I looked at the adjusting buttons once and found that only the switching from 230V to 400V and the wire feed, but no ampere adjustment is possible, as I knew from other protective gas welding devices. The operating cable is available but gives nothing. Who can tell me how this voltage adjustment is A table or similar is also not available in the net. I mean where you can take a basic adjustment of material thickness and voltage setting. Sure you could also find out by making some sample weldings.