A key fob is a small electronic device that allows you to lock doors and unlock a car with the push of a button. Keyless entry remotes typically have buttons for unlocking car doors and opening the trunk. A key fob uses a low-frequency, short-range radio transmitter to send a key fob signal to the receiver inside the car.
Some car key fobs can start the car engine remotely with the press of a button. Besides locking and unlocking doors, a key can also perform other tasks, like controlling windows, mirrors, and even summoning the car. Understanding how the key fob signal works can help you troubleshoot issues and optimize its performance.
