Key Fob

A key fob is a small electronic device that is typically used to control access to a system, such as a car, building, or security system. It generally operates via radio frequency identification (RFID) or near-field communication (NFC) technology. Key fobs may serve various functions, including unlocking doors, starting a vehicle, or providing secure access to restricted areas. In addition to physical security, some key fobs can also perform other functions, such as remote locking/unlocking and activating alarm systems. They often come in the form of small, handheld devices that can be carried on a keychain.