Made by the world famous Stebel from Italy, start this true air horn from 139dB of sound! For comparison, a gun explosion is about 140 dB...
It is for you to find out which best way, it is mounted in your scooter. All it takes is 12v power supply and a good mounting point. Comes mounting bolts and a relay with a (if it is necessary for your application).
Dimensions: approximately 5 "x 4.25" x 2.75