Set of 10 multicolor submersible underwater lights with batteries included. Just twist the tea light it is an easy on/off switch with replaceable batteries. The battery included gives the lights 12-16 hours of operation. These are not returnable. The batteries for these are CR2032-and 2 are used in each light. The size of these lights are 1" tall and 1 1/4" across. These lights can be used for parties in floral arrangements or put in a pool of water, fish tanks, anywhere you want to light .These are battery supplied and not returnable please read return policy. Pricing is for 10 lights in each set.