Describe: Vacu Vin's Concerto vacuum unit draws air slowly from the opened bottle, and the stopper with a cork slows down oxidation, keeping the bottle open to retain its flavor. Emit a sound when the required vacuum level is reached. Storing opened wine, slowing down oxidation. Not for Champagne. Products include pump set and 4 corks. Size Information: Weight: 0.2 kg Dimensions: 20.5 x 8.5 x 4.5 cm Use & Storage Use: Use air suction from the corked bottle and keep the bottle closed with another rubber stopper. Preservation: Keep in dry places. Wipe the product with a soft cloth after use. Brand Information Brand: Vacu Vin. Material: silicone. Products are not warranted.