Features:1. The product is powered by 2pcs AAA batteries and it cannot be used with rechargeable batteries.2. After each use, the wine stopper may be stained with red wine and the silicone plug can be removed for cleaning.3. When in use, if the battery is low, the ring light will flash, indicating that the battery is running out. Please replace the battery.4. This product has a special anti dump switch function to prevent the product from being affected by the overturning of the bottle.5. This product will automatically detect the air pressure in the red wine bottle continuously.Specification:Condition: 100% NewMaterial: ABS, Stainless Steel, SiliconeRated Power: 1.5WRated Voltage: 3VPrinciple: air pressureSuitable Occasion: familyBattery: 2pcs AAA BatteriesSize: Approx. 11*4.3 cm / 4.3*1.7 inWeight: Approx. 198g / 7.0 ozPackage list:1 * Vacuum Wine StopperSteps for usage:1. Press the product down to the red wine bottle, press the silicone part completely into the bottle, the ring indicator lights up, and the stopper starts working.2. After the vacuum is completed, the machine will stop automatically, and the ring indicator will automatically turn off after 5 seconds.3. This product will automatically detect the air pressure in the red wine bottle continuously. When the negative pressure leakage in the bottle exceeds the standard, the product will automatically start the air pump to replenish the air pump, so that the negative pressure in the bottle is maintained at a certain level.4. This product has a special anti dump switch function to prevent the product from being affected by the overturning of the bottle. When the product is working properly and the bottle is tilted at an angle greater than 45 degrees, the anti-tip switch triggers and the pumping stops automatically. When the bottle body returns to less than 45 degrees, the product restarts pumping.Note:1. Do not disassemble this product.2. Do not force the product onto the bottle.3. This product is only suitable for indoor use.4. This product is prohibited from being used for other purposes.5. Please do not use this product around flammable or explosive gases.6. This product is only suitable for general household use, not for commercial use.7. Keep this product out of the reach of children. Children are prohibited from using this product.8. When the product is not in use, please remove the battery and place the product in a cool dry place.9. It is forbidden to put this product into water or other liquids to avoid damage to human body and products.10. Do not place horizontally or invert the stopper and wine bottle when using to prevent the red wine from leaking into the stopper.11. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.12. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.