The Powermate VX 20 gallon air compressor offers the Instant Air feature which allows the user to draw 60 - 90 PSI instantly for inflation needs such as vehicle tires, bike tires, inflatable toys, air mattresses and any other item that may need inflated without having to wait several minutes for your tank to fill. This is done with no special hoses connections or switches. When the Instant Air feature is not in use the unit acts as a regular compressor offering 150 max PSI and delivering 5.0 SCFM @ 40 PSI and 4.0 SCFM @ 90 PSI. This compressor features a 1.5 HP heavy duty induction motor and oil free, maintenance free long life pump. The 7 inch wheels make the unit portable while the vertical tank design takes up less space in your shop or garage.