https://youtube.com/shorts/KkxEgMJWnyQ?feature=shareTo activate your Mardi Gras Fleur de Lis Hat, find the battery house up inside the hat & press the button again & again for all light options: flash, blink, steady lights, then off. One size fits most. LED Colors: 5 Green Mardi Gras Sequin Fedoras with Flashing Jade LEDs. Includes 3 replaceable CR2032 Batteries.