LED Zombie Skulls Halloween Lights Necklace is a ghoulishly fun Halloween accessory. Give out Skull String Lights as party favors, turn up the fright at a costume contest, or be safe and visible while trick or treating! To activate your Light Up Zombie Necklace, remove pull tab and press button located on battery housing. With each press cycle through 6 LED functions: Combination, Strobe, Blink, Alternating Flash, Flash, Steady. Dimensions: Necklace Length: 38″. Pendant (HxW): 2.25″ x 1.65″. LED Colors: 9 White. LED Zombie Skulls Halloween Lights Necklace comes ready to use with 3 replaceable AG13 Batteries. NOTE: This is a set of 12 necklaces.