KEWAYO 120dB Loud Bike Horn, Cycling Bicycle Handlebar Ring Bell Horn with 6 Different Sounds Black Super loud--up to 120 dB ,loud enough to get the car and the trucks drivers' attention. 6 kinds of sound effects. Extremely loud and clear sound. A free screwdriver will come with the bike horn, you can use it to install the horn easily. Work with 2 AAA batteries (Battery included) ; very easy to install on any bike handle bar. IP4 Rainproof.