Each Purple LED Ball Necklace features 7 purple 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, the alternate ball flashing mode, all colors flashing and steady on. All of our Light Up Ball Necklaces come with 2 - CR2032 batteries included and installed. Our Purple LED Ball Necklace is perfect for any event with a purple theme and they look great day and night! US Patent Number: 10,064,461