To activate your Mardi Gras Mask with LED Feathers, press the button on upper right corner (it’s hidden behind the feathers). With each push of the button, choose from 3 fun light functions: flash, blink & a cool morphing color change. LED Colors: Red, Blue, Green Dimensions, including Feathers (W x H): 11″ x 5″ Ribbons Length: 16″ Comes ready to use with 3 replaceable AG13 Batteries