1Can automatically detect the air pressure in the bottle and keep the vacuum in the bottle, so as to achieve a good preservation effect. 2When the bottle is tilted 45 degrees, the anti pour function is triggered to prevent the wine bottle from tilting. 3Equipped with LED indicator lights, prompt reminders of insufficient battery power, which is conducive to wine preservation. 4Suitable for most bottle mouths, and can be used for storage and preservation of all red and white wines. 5Adopts sophisticated production technology, has excellent performance, is energy saving and durable, and has a long service life. Item Type: Electric Wine Stopper Main Material: ABS, Food Contact Silicone Product Size: Approx. 7.5 x 7 x 4.5cm / 3.0 x 2.8 x 1.8in Rated Voltage: 3V Rated Power: 3W Working Noise:1 xElectricWineStopper(Battery Not Included) without battery