Features:

Made of colorful and durable ABS.
With loud siren, up to 90 decible.
360° rotation of the bracket.
Suitable for handlebar diameter about 2.0~2.5cm.
Easy to be fixed on the bicycle.
Power by 2 * AAA batteries (Not included).

 

Specification:

Color:   Black, White, Yellow, Blue, Red  
Material: ABS
Size: 52 * 45 * 68mm / 2.0 * 1.8 * 2.7in
Weight: 55g / piece