Rocking Piston Air Compressor, Lubrication Type Oil Free, Number of Cylinders 2, Output Power 0.5 hp, Phase Single, Voltage 115/230V AC, Maximum Continuous Pressure 30 psi, Maximum Intermittent Pressure 30 psi, Maximum Vacuum 27.5 in Hg, Free Air Flow Rate 4.6 cfm, Maximum Speed 1,725 RPM, Inlet Size 1/4 in, Inlet Type NPT, Outlet Size 1/4 in, Outlet Type NPT