These can be downloaded onto your mobile device and used to perform a number of functions. Many automakers have now developed special apps for their cars. We elaborate on what exactly Keyless Entry is, here. In most cases, you have to be extremely close to the car for this to work. If it's in range, the fob receives the signal and transmits its access code. It then sends out a signal to search for the key fob. Now, your car can detect when someone places their hand on the door handle. Recent advances have seen this updated to be more convenient, and is one of the best options to add to your vehicle when you buy. This is one of the more common technologies, but it isn't truly hands-free. Remote controls have been around for some time now, allowing you to unlock your vehicle from some distance away at the press of a button. Nowadays, there are multiple forms of keyless car entry.