Supernova Light Lanyards LED Badge Holders are useful for concerts, festival, special events and trade shows where noticeable lanyards are required. Attach your ID and rock out at Backstage or be quickly identified as a vendor. To activate your Space Neon Lanyards, remove pull tab and press battery housing. Cycle through 3 LED functions: Slow Pulse/Fast Color Change Combo, Strobe, Flash . Dimensions: Necklace Length: Approx. 36". LED Colors: Red, Blue, Green. Color Change Supernova Light Lanyards come ready to use with 2 replaceable CR2016 Batteries.