High-quality materials: The bicycle horn is made of polished aluminum alloy, is weatherproof, not rusty, and the rubber ball is very soft. If you pinch the nozzle, the elastic ball in rubber returns automatically back to its original state when you inhale. Safe and Loud: After pressing the rubber ball, you will hear an audible horn sound. Retro looks provide unique, eye-catching and unique sounds that make it clear to everyone that you are coming. Adjustable clamp: This bicycle horn is ideal for bicycles with handlebars. Tighten the screw with an Allen key that can easily be attached or removed from the bicycle handlebar. Wide range of applications: This classic retro bicycle bell is suitable for common bicycle handlebars, but also for bicycles, mountain bikes and retro bicycles. Easy installation: Simply tighten the screws with a hex key / screwdriver (not included) for easy installation on the bicycle handlebar and removal from the handlebar.