describe With liquid sensing function, it will automatically open when immersed in water. These amazing LED ice cubes are completely waterproof. They are intended to be used in beverages and produce surprising results. Do not freeze. If put in water, the LED will automatically light up. Perfect for weddings, parties, birthday parties or celebrations. Not recommended for must-drink liquids. It can be placed in various liquids to create a mysterious and romantic atmosphere. Product Description: Tips: You can put them in a glass or water, but the temperature should not be too high; the battery is not replaceable; the continuous lighting time is about 8-25 hours. How to use: After cleaning ice cubes, water or glass, it will light up automatically, wipe it with a cloth after use, and put it in a dry place for next use. These lights add brilliance when added to your vases, display jugs, and look great in clear wine cabinets. They can be used to enhance home displays for parties, weddings and other events. When you put these smart little LED lights in liquid, they light up. Not recommended for liquids that will be consumed. The LED will automatically turn on when put in water and automatically turn off when you take it out! Not suitable for kids. Specification: Weight: 201g Color: Multicolor Dimensions: 26x26x27mm