LED Rainbow Prism Flashing Party Rings are a great addition to EDM outfits, raves, festivals, concerts, bachelorette parties, as well as club environments.To activate your LED Rainbow Prism Flashing Party Ring, remove pull tab & press button to activate 1 function - Flashing. Rings come ready to use with non-replaceable batteries. Specifications: Size: One size fits all LED Colors: Red, Blue, Green