When comparing the performance of this air compressor to other larger and more expensive units, I was stunned. Though it fits into a small cabinet or underneath a workbench, it outperforms other air compressors twice its size! What's important in an air compressor? Its ability to deliver an ample supply of air (measured in standard cubic feet per minute, SCFM) to run a variety of air driven tools, tire inflators, brake bleeders, paint guns, etc. When the tank's air supply dips to 120 psi an automatic cut-in activates for sustained performance. For safety a cut-off is activated at 150 psi so the tank doesn't over fill. With this compressor and the appropriate air tools, you can quickly change tires, loosen those repetitive fasteners (like on oil pans), fill tires, blow clean the workbench or blow out clogged windshield nozzles (last week's project) The list is endless. Impressive air delivery at 7.8 SCFM @ 40psi and 6.0 SCFM @ 90psi. At only 22 1/4"w x 28 1/2"d and 14"h, it easily fits in a trunk should you want to take it to a remote job site. The quiet 3.5 peak HP motor draws only 15 amps and runs on 120V household current via the 5 1/2' 3-wire grounded power cord. ASME safety valve and built-in air regulator are installed and the 4.3 gallon tank is oil free. The removable faceplate can be mounted anywhere. Once you've had an air compressor in your garage you'll never go without.