1. ??LED color changes depending on the water temperature??: The built-in LED shower temperature sensor helps you to recognize the water temperature when you take a bath. Blue: cool below 32 ?? C, green - warm (32-38 ?? C), red - hot above 39 ?? C. 2. ??No batteries or other power supply required??: These LED lights are powered by running water, energy saving and environmental protection. The beautiful process of RGB color change will relieve your stress, remove your tiredness and relax. It's like having a wonderful experience after showering. 3. ??Material??: Made of sturdy brass and rubber with excellent corrosion resistance. The light doesn't fade and keeps a new look! 4. Easy to install: attaches to any standard shower arm in minutes, no tools required. The water flow and circuit are separate without any leakage phenomenon, so it is very safe to use. 5. ??Full body coverage and adjustable angle?? This 8 inch round / square shower head and many nozzles will give you the best shower experience.