Using a vacuum pump to slow down the oxidation process that occurs after opening a bottle of wine s Wine Saver allows you to extend the life of your wine To use the Wine Saver simply place the re usable stopper in a wine 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 Features . Easy to use. Slows oxidation and extends the life of wine. Patented click indicates proper vacuum seal. Two re usable rubber stoppers included Specifications . Color Black. Weight 0 39 lbs