Features:
100% Brand new and high quality!
One Key Control， Easily install and compatible with all bikes including road bikes
Security Surveillance: If the Bicycle is shaking， the horn will sound an alarm for 15 seconds
Waterproof， Ultra-loud & clear sound
Easy and safe to use when braking
Perfect choice for your riding.

Specifications:
Color: Black
Material: Plastic
Size: approx. 60 x 40mm
Battery requires: LR44*4
Net Weight: 64g

Package includes:
1 x Alarm
2 x Ties