How does Evaluate Feature Power Set work?

I have doubts about how this tool in Random Forest works.
What would be the minimum and maximum values (min/max power set size)?
We have a set of 10 bands and 10 land use classes. When selecting this function, how should we proceed?
What is the concept behind this function? The help does not have enough information about how it is applied and what it is for.
Is it necessary to have internet or does it work offline for SNAP to work?

Thank you