Silicone Vacuum Wine Bottle Stopper, Champagne Bottle Stopper, Automatic Leak-Proof Sealer, Reusable Kitchen Keeper Description: Smart Induction: When you press the wine cork into the bottle, it will immediately touch the sensor switch to activate the air extraction function to achieve the 2 in 1 effect.< /p> Automatic sensor system: the electric wine stopper keeps the vacuum continuously in the bottle to realize efficient storage and preservation. Atmospheric pressure detection: when the negative pressure inside the bottle leaks 0.01Mpa , the electronic wine stopper extracts the air repeatedly by itself. Waterproof: the electronic wine stopper is tilted at 45 degrees when operating, the anti-pumping function begins to work to prevent leaking. Power reminder: the champagne cork has an L light ED, real-time power control, with dust-proof bottom cover, convenient storage and no pollution. Specification: Material: ABS+Silicone. S size: approx. 7.1x7.1x4.85cm/2.80x2.80x1.91inch. Power supply: 2 AAA dry batteries (not included). Package includes: 1 cork of wine.