Setting up the airbrush takes minutes. Position the compressor unit somewhere near your workspace, attach the intercooler line-that's the one with the coils-to the compressor output and then to the water separator. The non-coiled line goes from the water trap to the airbrush. Plug the unit in, flip the switch, and it will run until reaching 35 psi, then automatically shut off. When the pressure drops, the compressor kicks back on to maintain pressure.