Very small size and high quality bicycle horn. It is characterized by its small size, its sound strength of up to 90 decibels, and it is also water-resistant. It contains three types of horn sounds that can be changed by pressing and holding it for 3 seconds. Made of silicone to fit all types of bicycles. Suitable for alerting pedestrians while you are exercising in crowded places. It works by batteries and does not require charging.