RGB LED Light up Shower Head with Temperature Sensor - 100% Hydroelectric No Batteries Needed Shipped From USA  Delivery 2-5 Business Days Built in temp sensor to determine lighting color Green for cold water, Blue warm water, Red hot water and flashing red for boiling water no battery needed, uses the water flow to generate electrical power Made from high quality strong plastic for long lasting very, simple and easy installation (about 10 sec ) Makes your shower colorful and gives you cool, fun, safe and enjoyable shower experience