Features: No batteries and external power supply, it will illuminate after water flows down. The sensitive shower head light will change colors according to the temperature of water. The color's change remind you the water's temperature. Water glows Red when water is Hot (temperature above 39C). Water glows Blue when water is Warm (temperature is 32C - 38C). Water glows Green when water is Cold (temperature below 31C). ABS electronickelling material, excellent corrosion resistance, durable. 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. Get the CE RoHS certificates.