To activate your LED Glasses, push the button on the battery pack behind the ear. 3 light choices to choose from: quick flash, slow blink or a still light. Wires throughout glasses are covered, never exposed, so safe for all. Size: One size fits most. LED Colors: 12 Blue Come ready to use with 2 replaceable CR2032 Batteries. Packaging: Retail ready, individually packaged in clear poly bag, 12 pieces per inner box – 144 pieces per carton.