The flashing LED Pacifiers have 5 LED's each in multiple colors. The silk neckstring is included. These body lights are popular resale items for vendors, c-stores, skating rinks and clubs. They also make great gift items for kids parties. They are operated by a push button on/off switch and are powered by 3 AG-3 Batteries (included). Batteries are replaceable easily replaceable on this item. We offer this item individually or by quantity discount (please order in lots of 12). This item is intended to be used as a toy for children ages 3 and up. It poses a choking hazard for infants due to the removeable parts.