SMART VACUUM PUMP Stage: 2 stages Power Supply: 110V-60Hz; 220V-50/60Hz Motor: AC induction motor Speed regulation: Fixed speed Vacuum accuracy: 1-10000 microns ±10% of Reading ±10 microns                                10000-19000 microns ±20% of Reading Usage environment: 5℃-40℃/41℉-104℉ Transmission distance: 30ft/10m Limit vacuum: 15 microns Pumping rate: 7CFM(3L/S) Motor power: 3/4hp/550w Fuel volume: 22oz/650ml Overall dimension:  18.5in*10.5in*14.8in/470mm*267mm*380mm Weight: 34.2 lbs/14.8kg Air inlet: 1/4 SAE; 3/8 SAE