A key fob is a small electronic device that allows you to unlock and start your car without using a traditional key. It usually fits on your keychain and communicates with your vehicle through radio signals. When you press a button on the fob, it sends a signal to the car, enabling you to access it easily and securely. Many modern cars, especially those from brands like Toyota or Ford, come with key fobs that also have additional features, such as remote start or trunk release. This convenience makes it easier for drivers to manage their vehicles while enhancing security against theft.