100% brand new. 4 Loud Siren Sound. 6 red blue led light with bike siren. A Loud Siren to draw people's attention on street. Keep your kid from danger by warning or noticing others. A switch controls the flash modes give the effect of flicker. Easy to be fixed on the bicycle. Material: Plastic. Size: about 13 x 7.5x 3.5cm. Powered: 2 x AA Batteries (Not included).