ROCKBROS Electronic Bicycle Horn Cycling Electric Bells Mini E Bell Rainproof MTB Lightweight 75 DB Bike Handlebar Adult

3 TYPES OF SOUNDS: The sound is very loud and clear. There are three models of sounds. After pressing for 3 seconds on the switch, you can change another sound. IPX4 WATER-RESISTANT AND SHOCK-RESISTANT: The electric bell is waterproof and you can also use it when it rains. ATTENTION: Do not immerse in water. QUICK INSTALLATION: The bell is mounted by a hook on the back. And the band is elastic and gentle to adjust different diameters and also not damage the handlebars. BUTTON BATTERY: Two batteries and the life span is about 1 year. QA: We offer one year quality assurance, if you have any quality problems, please contact us and we can help you to solve the problem!!! Note：the volume is not loud enough in a place with lots of cars, so it's not suitable to use in the busy street.