1. One button easily turns the necklace on & off, as well as controls distinct light setting options range from flashing to all on
2. Funny Disco Ball bulb necklace at your family celebrations, holiday birthdays, Perfect for New Year, Parties, Rave, EMD & other nighttime events
3. Light Up Necklace With Disco Lights with 9pcs bright white lights, comes with 3 functions.
4. Batteries included & installed, ready for immediate use