Features: 120 db loud enough to remind the trucking, bus, car and van drivers make riders safer. Split button switch can be mounted at any position with the handlebar, easily accessible, when the brakes are operational. Easy to install, suitable for many models diameter handlebar. IP44 waterproof, no need to worry the rainy day. Unique appearance, small and delicate. Descriptions: Extremely loud and clear sound. Best accessories for your bike. Compatible with all bikes including road bikes. Specifications: Material: ABS Color: green, red, blue Size: 102x51mm Brightness: 250LM Type: battery(3 x AAA batteries, not included), USB cable Package Included: 1 x Bicycle Bell Cycling Horns Notes: We have different kinds of package type. One only has horn which is powered by battery. The other has horn and USB cable because the horn is powered by USB. You should choose the one you need