To activate your Multi Color LED Scarf, find the battery house concealed in its end, remove the pull tab & press the button. With each push, choose from many light functions - fast flash, slow color change, all lights steady on, red blink, blue blink & green blink. Easy to conceal the battery house back inside the scarf. Specifications: Fabric Length: 5 ft. Material: Fluffy Polyester LED Colors: 3 Red, 3 Blue, 3 Green