Shhh air compressors are virtually silent in operation and so can be used in places such as offices shops studios laboratories surgeries and small workshops where noise is either unacceptable or an annoying distraction.- 1.77cfm displacement from a single compressor pump unit- 9 litre air receiver (CE certified)- 0.5hp 230v 1ph motor with thermal overload protection- 8bar (115psi) maximum working pressure controlled by fully automatic pressure switch- SpecPTDCLA2320870