Electric Loud Bike Bell Siren Bicycle Horn with LED Light and 4 Sounds Get this loud Bike Siren with 6 red LED flashing lights and you can warn them before they do It is easily attached to the bike with 2 clamps, one for the light and another for the control switch Suitable forhandlebardiameter: about 2.2cm 6 Red LED flashing lights, 4 different siren sounds A switch controlling sounds and lights