Our light up pacifier necklaces are the ultimate rave binky. Each pacifier is attached to a breakaway necklace to avoid from becoming a choking hazard for the young. Every binky contains one Red, Blue, Green, and Yellow LED for a bright and powerful combination. The LED pacifiers are sold in an assortment of colored shells (clear, pink, blue, & purple). 3 AG10 Batteries are pre-installed and internally power each pacifier for hours. Play responsibly don't give light up pacifiers to children under the age of 5, intended for novelty use only.