You know how GelGems'gleam in daylight and glow at night? Well,now they sparkle anytime with our amazing LED techology. They have developed a method for safely embedding heat free light emitting diodes inside the clever GelGems. each gel-imbedded LED attaches to a generous cord that allows you to place the gel shapes anywhere in a 360 degree radius. Runs off of two common lithium batteries that enable the lights to glow steadily or blink. Each package includes two batteries. Each purchase comes with what is pictured above, packaging measures 10.2" x .6" x 13"