The hornit db140 is the loudest cycle horn in the world! With no less than 140db all other road users will notice you. even cars will notice you and because of that, you will be much safer in traffic. the hornit db140 has two different sounds; the sound of the horn of a car of 121 db and a huge loud 'beep' of 140 db!the Hornit is very easy to mount and suitable for all bikes.features- operates on 2 x aaa batteries (included)- wing clips are suitable for any bike- 2 sound effects (121 db and 140 db)- remote control on handlebar (no need to take hands off handlebars)- ip44 weatherproof (resistant to water splashes and objects greater than 1mm diameter)product information- product: hornit db140 - material: plastic- dimensions horn: l 9.8 x w 4.8 x h 4.2 cm- weight horn: 48 gram- dimensions trigger: l 3.5 x w 2 x h 0.9 cm- weight trigger: 10 gram- dimensions handlebar: l 4.5 x w 2.5 x h 3 cm- weight send confirmation: 12 gram- total weight: 94 gram- colour: black- packaging: retail packaging- packaging dimensions: l 13 x w 10.5 x h 5.5 cm - packaging weight: 150 grams- brand: hornit