A Christmas Gift to bring her glee. Sunglasses of a Christmas Tree. All get together, play charades. And while you do, wear Christmas shades. To activate your LED Tree Glasses, press the button on the battery pack behind the ear. Click the button repeatedly for every light option: flash, blink, steady off. Specifications LED Colors: Multi Color Size: One size fits most Batteries: Includes 3 replaceable AG3 Batteries