The wine saver is a vacuum pump, which extracts the air from an opened bottle and re-seals it with a re-usable rubber stopper. place the re-usable stopper in the bottle and extract the air from the bottle using the wine saver pump. a “click” sound tells you when you have reached the optimum vacuum level. the vacuum slows down the oxidation process which makes it possible to enjoy your wine again on a later date. the question “how often do i have to pump?” is a thing of the past. the unique and patented vacuum indicator will emit a “click” sound when the correct vacuum is reached