Keyless remotes require only the push of a button to lock or unlock the car door. These devices are usually a little plastic fob that fits on a key chain.
Keyless remotes work by sending a digital signal to the radio signal programmed into the car. Both the fob and the car’s receiver device are set to the same frequency. This keeps you from opening your neighbor’s car.
Each keyless entry system in essence is a unique communication between a radio transmitter and a receiver. Fob transmitters utilise the same process as many other electronic devices use, radio transmissions which travel on electromagnetic waves.