What does a key fob do?

A key fob is a small electronic device used for remote access and control of various systems, typically in vehicles and security systems. It allows users to unlock doors, start engines, and sometimes access additional features like trunk release or alarm activation without using a traditional key. Key fobs often use radio frequency signals to communicate with the vehicle or system they control, enhancing convenience and security. Some advanced key fobs also include features like keyless entry and proximity sensing.