BATTERIES REQUIRED!!!It has a built in sensor that can detect the change in temperature of the water, the integrated light that is powered by the water flowing through the tap (need for batteries) alters the light colour from green, to blue to red as the temperature of the water changes.Specifications:Material: Brassiness: As the picture showWork temperature: 0-90°Features:-LED changes colour according to water temperature.-Complete with 2 water hoses-Suitable for single hole sink mounting.-Water is between 0.1 bar and 1.5 bar.-Working temperature between 0 and 90 degrees Celsius.-Smooth and Refined Turning mechanism to bring comfort in handling.-Create a beauty that is close to nature, so that you can enjoy the beauty of the springs and waterfalls at home.-- Constructed from solid brass for durability and reliability.PackageIncluded: （not including batteries）1 x Water Tap2 x Water PipesNote:-Due to different producing batches, product details might be a little different. If you mind the difference, please buy it carefully.-Duetothedifferentdisplayanddifferentlight, thepicturemay not reflect the actualcoloroftheitem. Thanksforyourunderstanding.Ifyouhaveanyquestions,pleasecontactus.Wishyouhaveahappyshoppingtime! a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a