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 horn Material: ABS Size: 6.5x3.5cm Package Included:1x Bicycle electric horn Notes: 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.