These LED Fedora Hats with Flashing LEDs are just what you need for a night out on the town or wear to a stylish wedding and light it up at the reception for added fun. These light up hats look great at any event. To activate the LEDs press the button located on the battery pack inside the light up fedora. Set the sequin hat on a random light flash, blink or steady light. One size fits most. These hats include 3 replaceable AG13 Batteries.