Your students will light up the night as they become part of the action on the dance floor while wearing this Light-up Gold and Silver Disco Ball Necklace. It's a fun way to accessorize and get into the groove of a 1970s, Hollywood, Vegas, or Decades Prom, Homecoming dance, or Senior Party theme. Each 40" long necklace features alternating gold and silver 1 5/8" mini metallic disco balls with built-in LEDs for light-up fun all night long. Just click the on/off button to activate the light and choose from three different flash settings. Three AG13 batteries are included and installed. This fun, flashing necklaces also makes a fun addition to your school store and concession stands at night games and events.