Almost every day a birthday guest may walk through the door. Be prepared with the Happy Birthday Star Flashing Necklaces. This party favor is perfect to have on hand for those who choose to celebrate their birthday with you. Simply activate and hand out to each of your birthday guests. Each inexpensive piece includes a thirty-five inch necklace with a 2.7 inch by 2.7 inch star medallion attached. Batteries are included for a quick and easy use. Comes packaged wholesale in a pack of twelve individual pieces.