What is an electric bicycle horn? It is not only a bicycle horn, but also a burglar alarm. The bell keeps ringing when someone touches or tries to steal your bike, protecting your bike from theft. Suitable for: 0.86-1.25 inch (22.2-32mm) handlebars for mountain bikes, road bikes, scooters. 3 sound modes: The volume of the bicycle horn is 80-130 DB, adjustable. There are 3 levels of sound, the third level is the most sensitive and the first level is the least sensitive. This is a bicycle accessory for your adult or child, girl, boy. 250mAh Rechargeable Battery: The bike horn is easy to install and charge, you can charge it with power bank, phone charger or computer USB port. 2000-3000 rings on a single charge. Waterproof bicycle bell: Even when riding in the rain, don't worry. It is made of waterproof material with an IPX6 rating. Package Contents:1 x bicycle horn, 1 x silicone strap, 1 x USB cable, 1 x user manual