Each White LED Ball Necklace features 7 white plastic LED Balls and 6 different light settings. With a click of the on/off button choose from a slow to fast flashing mode, super fast flashing mode, blinking mode, alternate color flashing mode, all colors flashing and steady on. All of our Light Up Ball Necklaces come with 2 - CR2032 batteries included and installed. Our White LED Ball Necklace is perfect for any nighttime event or light-up party. US Patent Number: 10,064,461