Got this as a gift and I just don't see myself using it. Only took it out of the box to test it out. It is very loud and not overly sensitive. Attaches to any vehicle (or anything really) with double-sided tape or zip tie. Runs on a button battery. Comes with a zip tide, double-sided tape and a tiny screwdriver to replace the batteries. Not only suitable for bicycles, e-bike, motorcycles, scooters, trailers, golf carts, cars, but also can be used in mailboxes, doors, windows, luggage and other places where burglar alarms are needed. Pretty cool item I just don't leave my bike anywhere it is at risk.