This loud bicycle horn reaches up to 130db, which can effectively alert pedestrians and other riders to avoid accidents, suitable for both adults and kids. It fits 22.2mm and 32mm handlebars, compatible with mountain bikes, scooters and ebikes. Powered by 3V battery, it requires simple tools for quick and easy installation, no complicated professional steps needed. It is made of sturdy durable material, stable in daily riding use, ideal for urban commuting, outdoor cycling trips and trail riding to keep your ride safer.