10 sets of NEW Battery LED 3 BLUELIGHTS per set-using a small battery pack to hide in the tops of the towers. Just poke the lights down the inside of the vase and the battery pack, it does fit inside our vases but we are unsure if they will fit in others. 2 CR2032 batteries per light are supplied, Battery pack has on/off switch. The lights are 30" long clear wire cord.These are battery included items and NOT RETURNABLE. There is no way for us to prove they will be new on return and we could not sell again.