Disco Lights Mardi Gras Party Necklace is one groovy necklace! Complete with 9 disco ball-style bulbs that flash and glow wondrous white light in all directions, every night is a night at the discotheque with Disco Ball LED Mardi Gras Necklaces. In addition to Fat Tuesday, Light Up Necklaces are perfect for birthdays, sporting events, raves & festivals. To activate your Mardi Gras LED Necklace, remove pull tab & press button battery house for 3 light functions: Flash, blink, color pulse. Disco Lights Mardi Gras Party Necklace includes 3 AG13 Batteries. Batteries are replaceable.