Turn on the fun in your shower just by turning on the water, the LED lights will automatically light up and set the mood. They will even change colors automatically based on the water temperature. All this with no batteries, everything is self-powered by a built in dynamo that takes advantage of the water pressure to create the energy to light the bulbs. Auto Temperature Detected Light Color Change! The shower head will automatically change colors according to the temperature of the water. So you always know how the water will feel on your skin just by looking at it. When water temperature is below 113'F lights will be BLUE. When water temperature is between 114"F - 121"F lights will be RED. When water temperature is over 122'F a RED warning light will flash. Never be scalded again by entering a shower that is just too hot! Feature: 1. 1/2" standard connector. 2. Easy to install and clean. Can be cleaned with mild soap to ensure the non-tarnish life shine. 3. Package include: (1) 12" brass shower head with Wall-mount shower arm . (2) Multi-function solid brass control valve (3) 6 massage jets spray (4) Brass hand shower with Brass hook and Brass outlet. PLEASE NOTE: This system comes with regular Mixer Valve / 3 Way Diverter (one function at one time). If you need an Advanced Thermostatic Mixer Valve which gives you flexibility of using one function or two functions at the same time please refer to model HDD907A or HDD907WA Brand New - 100% Satisfaction - Full Refund