Ding ding - coming through! This eBike Bell will grab the attention of walkers and joggers when you're passing from behind on your 'Lectrified ride. Plus, a hidden compartment allows you to hide a tracking device inside of it to help protect your eBike from theft! Quick and easy installation process to any Lectric eBike's handlebars Convenient and easy-to-use thumb lever Hidden compartment for Apple AirTag (device not included) to help protect your eBike from theft A 134 dB ring will make your presence known, loud and clear! Compatibility: All Lectric eBike Models Most standard bicycles or eBikes What's in the box: (1) Bell (1) Philips screw Note: Apple AirTag not included. Product Specifications: Material: Copper Dimensions: 38x49x56mm Waterproof grade: IPX5 Clamp diameter: 22.4mm Sound decibel: 134 dB Spring-loaded thumb lever Instructions: Bell Quick Guide Found Here.