Sunnice&reg; Brand New Police Sound Light Electric Horn Siren Bike Horn Bell 6 red blue led light with bike Siren switch controls the flash modes give the effect of flicker 120db Loud electronic signal penetrates traffic noise, cool enough to draw people's attention on street Lightweight and impact resistant,Loud Siren Sound. Looks like a real thing Size Dimension: 11 x 5.5x 5.5cm;Powered: AA Batteries x 2 (Not included)