Instantly know the temperature of the water coming out of your tap with this LED faucet light nozzle attachment. Changes the color of the water based on the temperature of the water flow. Batteries not required – powered by the flow of water exiting the nozzle, hot water turns the LED red, and cold water turns the LED blue. It prevents kids from burning their hands as the color would right away let them know when it is safe to touch the water. Brings a whole new look to the faucet.