Features 1. 120dB loud bicycle horn: The waterproof electric bicycle horn has a 120dB loud volume and warning sound, effectively reminding passing pedestrians and vehicles. 2. Easy to install: The 120dB electric bicycle horn is very easy to install and does not require any tools. You can install or uninstall it onto the bicycle handlebar within a few minutes. 3. Long battery life: This loud electric bicycle horn can be used for a long time. It has 2 standard CR2032 batteries and can ring approximately 4000 times continuously. 4. Suitable for multiple bicycles: These loud bicycle riding bells come with stretchable silicone tape that can accommodate handlebars of different diameters. 5. IPX4 waterproof level: electric car bells are rainproof, sealed and dustproof, high-strength shockproof, fearless of wind and rain, and fearless of travel. Specification Material: ABS+PC Decibel 120dB Waterproof grade: IPX4 Battery type: CR2032 x2 Color: Black, Blue, Red Size: 8 x 4.6 x 4.6 cm Weight: 50 g Package Include: Horn x1 Strap x2 Instruction manual x1 Anti slip rubber pad x1 CR2032 Battery x2