To activate your USA Star Flashing Charm Beaded Necklace, remove the pull tab & press the button on back of star. With each push of button, change your lights from flash, to slow change, to all LEDs on steady, then red blink, white blink & blue blink. Dimensions: Necklace Length 17 in. Star width 3.25 in. Star Height 3.50 in. Star Depth 1.87 in. LED Colors: 1 Red, 1 White, 1 Blue Bead Colors: Assorted Red, White & Blue Includes 3 replaceable AG13 Batteries. Packaging: Retail ready, individual poly bags, 12 pieces per inner box – 144 pieces per carton.