BADASS SHARKS El Wire Neon LED Light Up Shutter Shaped Glasses For Rave Costume Party Blue Can be used on any Occasional such as Occasional, Rave Parties, Discos, Clubs, Haloween ,Birthdays, Festivals and Events;Can be used on both Indoor & Outdoor Night Shows & Activities Best Use for every age group like Kids (more than 8 years old), Adults, Men & Ladies Has battery case controller switch button. (Not Included battery ) When you press the button, you would find the the light has three modes: constant light, slow flashing light and continuous quick flashing light Material: Plastic; Power: 1.5V 2 x AA batteries (not included)