A very bright submersible light ring with 12 LED diode bulbs that automatically change from Red to Blue to Green light, as well as the various shades in-between, all without requiring a remote control - it simply begins to cycle as soon as it is powered on. Ring inside diameter: 5/8" Ring outside diameter: 1 5/16" Ring thickness: 5/8" Outdoor/indoor 6 watt UL transformer is included. Submersible cord length is 33', cord leads out from the bottom of the ring. Note: This LED light ring can be used in or out of water! Backed by a 1-year MFG warranty.