A fob key, commonly known as a key fob or remote key, is a small security hardware device with built-in authentication used to control and secure access to mobile devices, computer systems, network services, and, most notably, vehicles. Operating on radio waves, these keys communicate with the car’s systems to lock and unlock doors, start the engine, and perform various other functions without physical contact. There are several types of fob keys, including remote fobs, keyless entry systems, and smart keys, each with unique features and operations.
