Save $4!Running water activates this LED Faucet Light turning the water a bright blue. Turn off the water and out goes the light. It's great for getting the little ones to wash their hands, perfect for running the water in the middle of the night, and just a hoot anytime. Faucet Light installs in less than a minute and easily connects to almost all standard household faucets. Set includes 3 button cell batteries, wire screen, and 2 universal adapters. About 2.25" long.