Feature: 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 : IP65 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. Separate Switch Design: Control switch and bike horn are separated. You can install the control switch right next to your thumb, which can keep you hand still on the bar when you press it. Keep it safe cycling. Specifications: Material: ABS+PC Color: black/green/red/blue/pink Size: 65*50mm Sound:50-100dB Charge Input: 5V-250mA Battery Capacity: 280mAh Waterproof level: IP 65 Package: 1 * Horn with wired switch; 1 * Rubber Strap; 1 * USB Cable; 1 * Users Manual (English/Chinese Language). Note: 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 1-3cm measuring deviation due to manual measurement.