1. Material: ABS+food silicone grade 2. Product size: 71x48.5x71mm 3. Product net weight: about 96g 4. Power supply: 2 x AA alkaline dry batteries (not included) 5. Keep fresh for 7 days, smart storage, battery reminder 6. Built-in intelligent electronic induction system, insert it into the bottle mouth, press the wine stopper silica gel into the bottle and touch the sensor switch to turn on the automatic air extraction function. After the extraction, the bottle continues to maintain a vacuum to achieve efficient storage and freshness; automatic repeated detection The air pressure in the wine bottle will vacuum repeatedly by itself to keep the vacuum in the bottle.