It has a temp of 295-305 and 55-60 psi. The sheam vapor is very localized and does not burn anything. It melts away grease, oil, mold and all the yucchies without any chemicals.
It is about 1.5 long by 1 foot wide by 1 foot high.
I cleaned out a blige that would have used gallons of fantastik or other cleaner without fumes, chemicals etc. Just open the hatch and the steam leaves. By the time I was done, I could eat ott the bilge.
This is not at all like a power washer which I agree is a bad idea.