It's an air hog compared to an orbital. I use it at 50 -60 psi on a 5 hp / 80 gal tank and it "runs" my compressor. But in burst you could use it on say a 20 gallon system. I still let my system catch up on my sanders.
If you watch the sales at Harbor Freight it goes from 19.95 to 39.95 - buy the extended warranty for 10 bucks these do not like to be dropped. I’m on my 3rd one I paid full price for my first one broke it , took it back on the extended warranty got it replaced and a twenty dollar bill back because it was on sale.