The Wine Saver is a vacuum pump, which extracts the air from the opened bottle and re-seals it with a reusable rubber stopper. Place the reusable 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 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. Vacuum indicator Now with patented “click” Slows down the oxidation process Not for sparkling wines Prevents the oxidation process that is responsible for the deterioration of wine Incorporates a patented 'click' mechanism that indicates when the airtight vacuum has been established Highly durable - will tolerate regular and prolonged usage Suitable for all but sparkling wines Award-winning product (used in over 35 million households and more than 80 countries throughout the world) Contains: 1 x Wine Saver Pump and 1 x Vacuum Bottle Stopper (both re-usable)