The ROCKBROS CB1709GN is an electronic bicycle horn designed to keep you noticed and safe on the road. It delivers a sound intensity of 90 dB, which you can customize using three selectable modes to suit different traffic environments. Wrapped in flexible green silicone, the device is weather-resistant and easy to handle. It attaches to your handlebars via a universal silicone strap, allowing for a tool-free installation that fits various diameters comfortably.