1.Ultimate negative pressure value:20.075MPa 2.Air exhausting speed:215L/min 3.Power supply:AC220V±22V/110V±11V,50/60Hz±1Hz DC12V 4.Regulating scope of negative pressure:0.02MPa maxium 5.Reservoir:≥1000 mL,1pc 6.Input power:65VA 7.Noise:≤65dB(A) 8.Suction pump:piston pump 9.Battery working time:30 min.