Ultra-Soft Filtered Water: Built-in negative ion cleaning filtration with mineral beads, removes heavy metals, chlorine, bacteria and impurities, improving your water quality.LED temperature control: The color of the LED light is controlled by the temperature of the outlet water.If it is less than 30℃, it will be green, if it is 30℃ - 39℃, it will be blue, if 40℃ - 50℃ is red, if it is above 50℃No Batteries Required: LED lights are powered by running water and require no batteries or power sources.Enclosed waterproof core, LED water pressure activates when you turn on the shower head.Very easy to retrofit to your existing shower, simply unscrew the old shower head and screw in, it provides a very gentle, yet powerful spray and is removable for easy cleaning.it will flash red and white，enjoy wonderful bathrooms and beautiful colors.