Bicycle Bike high sound siren horn of 140 dB capacity. It has 6 different kinds of sounds. You can long press the speaker switch for 5 seconds to change the sounds, when you listen to the sound what you wanna, you loose your finger, that it is successful for your set up. 140db bicycle horn is super loud to attract passer-by and vehicles Control switch and bike horn are separated, it is very convenient for you when you are riding. Because you can install the control switch in the place where your finger can reach it easily. Easy and hassle-free installation. This device comes with Mounting bracket is retractable silicon rubber belt, suitable for the diameter of the handlebar approx 05 to 14 inch Dimensions - 8.5 x 5 CM :: Pack Contents - 1 Piece Bicycle Horn + 1 Mounting Bracket (BICYCLE_HORN_BIG_001)