RioRand Set of 36 Submersible Waterproof Underwater LED Candles Famaless Safety Tea Lights for Decoration Wedding Party Bar Blue Powered by RioRand Advanced Technology Perfect for lighting up vases, bowls, or any containers are filled water Can be turned on or off by twisting the base of unit ,Submersible,waterproof,flameless and high safety Come with 2 x CR2036 Submersible Batteries, which are replaceable Size of light is 1.25" wide and 5" high