The compressor puts out 4.5 cfm at 100 psi, enough to run two small nail guns or one framing nailer. When nailing sheathing, I had to slow down only a little. And the 4-gal. single tank has enough capacity that the motor doesn't cycle constantly. The unit weighs a little more than 60 lb. and has a wide tank-mounted carrying handle. The rubber base pad protects finished floors and helps to prevent the compressor from sliding around in my truck bed.