3 hp, 9 to 18 cfm Air Flow, 1/4 in Air Inlet, 3/8 in Minimum Hose, Ergonomic Soft Comfort Grip Handle, 89 dBA Power, 78 dBA Pressure Sound Level, Hook and Loop Pad Grip, 9.CP Random Orbital Sander, Tool/Kit: Tool, 2-3/4 x 7-3/4 in Pad, Rectangle Pad, 10000 rpm Orbits per Minute, 0.2 x 3.4 x 3.