Features:No batteries and external power supply， it will illuminate after water flows down.The LED color changes according to the water temperature.Transforming the stream of water into a beautiful waterfall of light.Brightness is such enough even no other lighting fixtures need.Fits all standard connectors， easy to install.Offer you a delight bath & a wonderful experience.Ideal for bathroom， to make it more fantastic.ABS and plating (chrome plated) material， excellent corrosion resistance， durable.LED color automatically changes according to water temperature:Water glows red when water is hot (42��C - 45��C).Water glows blue when water is warm (33��C - 41��C).Water glows green when water is cold (?32��C).When the water temperature is higher than 45��C， the Red light will start flashing， which means that the water is too hot and please be careful.Specifications:Case material: ABS + plating (chrome plated)LED emitting color: Green， blue， redDiameter of inlet tube: 2cm (internal screw thread)Item size: 3 * 22cm / 1.2 * 8.7in (Diameter * L)Item weight: 110g / 3.9ozPackage size: 23.7 * 3.7 * 3.5cm / 9.3 * 1.5 * 1.4inPackage weight: 127g / 4.5ozPackage list:1 * LED Shower Head