7 Colors Display Changes Automatically: 7 colors mix and blend automatically when water flows. No Battery and Need Other Power Supply: These LEDs are eliminated from running water, saving energy and environmental protection. Chrome Plated ABS Material: Excellent corrosion resistance and the light does not fade, lasting as new. Easy Installation: Suitable for 2 GPM/1 gprm which combines in minutes with a standard shower arm and shower head, no tools required.