Flashing fiber optic baseball cap comes with a  "RAINBOW" logo. Each cap has high powered L.E.D.'s that light up the state of the art fiber optic technology built into these our custom embroidered high quality caps.  Each baseball cap has 6 panels and are complete with a self adjustable strap will fit most any head. GREAT LOOKING IN EITHER DAYTIME OR NIGHT. Perfect for prizes or favors at your event. Batteries are included and installed.Replacement batteries for this item: 2 pcs, type CR2032.