1.Glow in the Dark LED Bracelets in 7 Colors (Pink, Yellow, White, Green, Blue, Purple, Orange), Voice-activated atmosphere bracelet, flashing light when there is sound provide an extraordinary visual experience at the party. 2.Outer diameter 2.95 inches, inner diameter 2.5 inches, suitable for any child or adult wear. 3.You can use these light up bracelet as night activities,birthday party,beach party,pool party,animal party,wedding,concerts,dancing party,bar,nightclub,camping,raves,valentines day,Easter egg filler,Halloween party,christmas stockings stuffers,school classroom Reward. Try to enjoy the joy of glow in the dark toys in more special occasions!