Fein 9-77-25 Turbo III Wet/Dry 14.5 Gallon Dust Extractor Vacuum features an automatic on-off switch. Plug your sander into the panel mounted outlet. When you turn your sander on, the vac starts automatically. When you shut your sander off, the vac continues to run for 3 seconds to clean the hose. The Turbo III can handle power tools with inputs of 40 to 2000 watts (.3 to 19 amps). The powerful two- stage motor offers bypass cooling.