【120dB Loud Bike Horn & 6 Types of Sound】Loud enough to alert someone that a bike is coming, can be used in daily commuting. 6 different ringtones available (Metal Bell, Whistle, kids Bell), long press for 3-5 seconds to switch. (Tips: Please replace battery to get better effect after a long time of transportation or storage.) 【Quick Installation】Easy to mount and remove, tools free, silicone cover is high-elastic so that can adjust to different diameters, fits for most bike handlebars and also not damage the handlebars. 【IPX4 Waterproof 】This bike horn for adults cover is made of with soft silicone material, which will not damage the bike paint, the water-resistant and dustproof design greatly extends the service life. When you receive the electric bicycle horn, you need remove the insulation sheet to use it. 【Mini Size】The funny bike horn is small and portable, weight only 50g, with modern fashion look, great for road bikes, mountain bikes, kids bikes, city bikes, sports bikes, cruisers, BMX bikes, tricycles, folding bikes, scooters, and children's vehicles. It can be stored directly in a pocket or bag when not in use. 【After-Sale Service】Everyone has different requirements for the decibel of the bike bell, if the sound cann't meet your needs, please contact us, we will provide you a solution