Features: No batteries and external power supply, it will illuminate after water flows down. Automatic light switching. 7 color are displayed automatically when water flow. Main colors are Green, Red and Blue. ABS electronickelling material, excellent corrosion resistance, durable. Transforming the stream of water into a beautiful waterfall of light. Fits all standard connectors, easy to install. Offer you a delight bath and a wonderful experience. Ideal for bathroom to make it more fantastic. Case Material: ABS electronickelling Color: alternately stop automatic color, visible Rainbow (single or multi- color display and fast, regardless of the temperature change ) External thread diameter: 2.0cm (can match with all home-used hose) Color of the shell: silver Overall length: 20cm Diameter of the head: 8.4cm Surface treatment: electroplate Working Pressure: 0.3mPa The change of LED color will not be subject to the temperature of water. includes:1 x LED Shower Head