The Wine Saver is a vacuum pump, which extracts the air from the 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 at a later date. The question how much 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. Now with patented click. Slows down the oxidation process. Not for sparkling wines.