Features:

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.

Description:

Note: Please check whether the batteries are set correctly before use. we set the batteries oppositely because item work makes noise during delivery! Any information uncertain, Please contact us. Thank you.

Specifications:

Color: Black

 Material: Plastic

 Size: approx. 60 x 40mm 

 Battery requires:  LR44*4 

 Package includes: 1 x Alarm 2 x Ties