Alfi brand - Round LED Rain Shower Head - Shower arm not included. High tech rain shower head. Built in hidden dynamo. Automatically changes colors according to the temperature of the water. Standard size. Modern stylish design. This head can be used with either wall or ceiling mounted arm. High quality. Warranty : One year. Made from brass. Chrome finish. Thickness: 0.50 in.. Overall: 12 in. Dia. (4.5 lbs.)Turn on the fun in your shower just by turning on the water, the LED lights will automatically light up and set the mood. 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. The lights will automatically turn on when water pressure is turned on. The lights will dim and brighten when you lower and raise the pressure. So you can set the perfect mood, water and light. When water temperature is below 113 degree F lights glow BLUE. When water temperature is between 114 degree F to 121 degree F lights glow RED. When water temperature is over 122 degree F lights flash RED. Never be scalded again by entering a shower that is just too hot! Replace your old shower head with this exciting new product. The threading is universal so it will fit any standard shower head by simply unscrewing the old one by hand and attaching the new one Completely polished chrome made to match or stand out from your other bathroom fixtures This modern shower head is made out of brass, not plastic, so its made to last, not just to look good.