To activate your Lightup USA Guitar Necklace on Mardi Gras Beads, press the button on back of the light up guitar charm. With each push of the button, choose from a fast flash, slow color change, all LEDs on steady, red flash, white flash or blue flash! Dimensions: Necklace Length 17 in. Plastic Guitar width 2 in. Plastic Guitar Height 5.25 in. Plastic Guitar Depth .75 in. LED Colors: 1 Red, 1 White, 1 Blue Bead Colors: Red, Silver, Blue Lightup USA Guitar Necklace with Blue and Silver Mardi Gras Beads includes 3 replaceable AG13 Batteries. Packaging: Retail ready, individual poly bags, 12 pieces per inner box – 144 pieces per carton.