ZDD Product Material: elastic silicone Size: 3,5 cm * 3cm Sound decibel: 75DB Ring tones: three switching modes Waterproof rating: IPX4 Color: red Quantity: 1 piece Package content: 1 piece * Electronic speaker Compatibility: Silicone is flexible, suitable for all kinds of handlebars 1. 75DB decibels: There are 3 models of sounds. The sounds are not like normal bells. The first mode is suitable for a relatively quiet environment. If the environment is noisy, please switch to other mode by pressing the switch for 3 seconds. 2. IPX4 waterproof and dustproof: The electronic bell is waterproof and you can use it in case of a little rain. ATTENTION: Please do not immerse in water. 3. Assembly without tools: This bell is mounted by a hook on the back and you do not need any tools. And the tape is elastic and gentle to accommodate different handlebar diameters and not damage the handlebars. 4. Replaceable battery small and portable: The two button batteries are interchangeable. You can then change the battery yourself. Small and portable, suitable for racing bikes, mountain bikes, childrens bikes, city bikes or other types. It can be stowed directly in a pocket or bag when not in use. 5. Silicone material: This bicycle horn cover is made of soft silicone material that will not damage the bicycle paint, the water-repellent and dust-proof design will greatly extend the service life.