Our 3 pack LED lights in Martian headband sets are powered by LR44 alkaline battery (needed). Flexible headpieces, suitable for kids, teens, and adults. The silver glitter balls and flashing light function of this alien antenna headband set makes it easy to catch others' attention and rock a party. The flashing alien bopper is perfect for outer space, UFO & alien theme parties. Made of high-quality plastic material, safe and durable to use. The alien headpiece is lightweight and loose, so no more headaches from a too-tight band. The Martian antenna head bopper fits for Halloween, Christmas, carnival, indoor and outdoor parties, discos, nightclubs, cultural festivals, weddings, school festivals, masquerade balls, and birthday parties. Also be used as stage props, such as light dance, ghost performances, bar performances, etc. Premium quality. Child Safe: non-Toxic. Meet US toy standards. Safety test approved. Item #: 13853