The incredibly versatile Rainbow Beam Bar is 4 lights in 1! Select from attachments to create a 9.5" fiber optic light, a 7.5" light wand, or a 4.5" whistle, or remove the attachments and use it as a 2.5" mini LED light! Select any of the 7 rainbow light colors or have the Beam Bar cycle through the colors automatically! Uses 3 replaceable AG13 batteries (included).