The ROCKBROS CB1709BK is an electronic bicycle horn designed to keep you noticed and safe on the road. It delivers a sound intensity of 90 dB, which is loud enough to alert pedestrians and drivers, and offers three customizable sound modes so you can choose the tone that best fits your environment. Wrapped in a soft-touch flexible silicone, the device is both lightweight and compact, ensuring it doesn't clutter your handlebars. This weather-resistant and waterproof construction means you can continue riding in the rain without worrying about the electronics. It runs on two CR2 batteries, providing reliable power for your daily commutes or weekend trips. Installation is straightforward and tool-free, using a flexible silicone strap that makes it compatible with a wide range of vehicles, including mountain bikes, road bikes, scooters, and children's bicycles.