12 Pixi Hair (Tm) Brand: Led Fiber Optic Light-up Hair Barrette; Rainbow Color (Automate Change) - Rave Party Hair Accessories Brand: Pixi Hair (Tm): 12 LED Fiber Optic Light-up Rainbow color (automate change) Hair Barrette, length 14". Small barrette (1.5" x 0.25") Uses two CR1220 3v replaceable batteries (BATTERIES INCLUDED).8 hour battery life Up to 60 fibers , in clear that easy to hide under your hair but can glow with many color LED PIXI HAIR IS REUSABLE - you can wear them again and again. Just change the batteries when Glow become too dim Great for any nighttime event - rave party, prom, holidays, parties, nightlife, concerts, raves, festivals, weddings, they add sparkle to a floral arrangement or table centerpiece, and more!