This is a set up for shop or mobile use. Comes with all accessories including filter dryers and extra sight glass. Compatible with R-12, R-22, R-500 and R-502 refrigerants. This is the time to get a jump start on recycling of all phased out refrigerants. All us technicians know by now how valuable it is to ensure the cleaning of a refrigeration circuits' oil for efficiency and longer life of the mechanical components. Not to mention the changes put into effect by new EPA section 608 regulations.