Built-in LED lights, no batteries and external power supply, it will illuminate after water flows down..The color changes according to the water temperature.^ Change color with the change of water temperature, when the water temperature is lower than or equal to 32 degrees, freely convert to blue. It displays red at 41-45 degrees. When it exceeds 45 degrees, the red light flashes as a reminder. Be careful to avoid burns ^ The LED Water Faucet is equipped with a converter. ^ The converter can make the product suitable for various faucet interfaces.Made of ABS material with excellent corrosion resistance.^ Transforming the stream of water into a beautiful waterfall of light. Offer you a delight,wonderful and romantic experience.Ideal for bathroom or kitchen to make it fantastic.^