Introduction:1.Three times vacuum-press recirculation, which fully eliminate air ensure fully steam penetration, ensure reliable sterilizing effect and protect the thing.2.Dry fast by afterward vacuum plus heating.3.Several built-in adjustable programmes which avoid wrong operations-just choose a key according to what you are dealing with, and her do the rest.4.Reliable vacuum pump, which can reach 80% total vacuum.5.Fully computer controlled, digital meters.6.Diagram illustrates what she is doing, nice and clear (Patents Pending) .Specifications:1.Chamber volume:20L 2.Chamber size:250 x 400mm 3.Overall size:680 x 430 x 445mm 4.Power:220V, 50Hz 5.Wattage:1800W 6.Over weight:25kg