Safety First : This Loud Volume & Mini Size Electric Bike Horn can reach 120 db which is loud enough to alert anyone or even people in a vehicle to your presence. Perfect bicycle accessories for you or your kids.Environment-friendly : Instead of using normal battery, the little scooter horn is powered by a rechargeable battery. It can 2000 times with a full charge, which is enough to work 20-30 days.Durable with full protection : IP4 level waterproof + Anti-dust + Shatter-resistant. Fully satisfy your outdoor cycling needs.st to install and quick release : easily mounted and secured with the stretchable straps. No tools needed. You can install or uninstall it on your bike handle bar within 20 seconds.Anti-theft Alarm: Long press the left button of the bicycle horn to enter the early warning state. If shaking or vibration is sensed after that, the super bike horn will immediately emit a loud alarm to protect the safety of your bike.Specifications:Product Name: Bicycle electric hornMaterial: ABSSize: 6.5x3.5cmPackage Included:1x Bicycle electric hornNotes:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow 0.1-2cm measuring deviation due to manual measurement.