what is fob key

A key fob is a small, handheld remote control device that is used to control a remote keyless entry system. It contains an RFID chip and an antenna inside, and uses radio frequencies to communicate with another RFID tag. Key fobs are commonly used to control vehicle systems, such as locking and unlocking doors, starting the ignition, and controlling automatic windows. They are also used to access restricted areas, rooms, and network services, providing a convenient and secure method of access. Key fobs use rolling codes to prevent signal cloning and hacking attempts, making them an integral part of modern security systems. Overall, key fobs have become an essential and convenient technology for many peoples lifestyles, offering both security and ease of use.