Designed for fountains, spas, bathtub, aquariums, vases, etc.; this waterproof 2.75" dia. x 1-1/4" thick light contains 10 ultrabright RGB LED's that can produce 16 colors and has 4 modes of operation. Light operates on 3AA batteries (not included). Remote control has built in battery. Operates up to 50ft from remote in air or 2ft submerged. Put on in the tub and your children will love bath time. Brand new in factory box with instructions. Very simple to use and unique! Makes a fun gift!