If it's an electronic car key, it has a chip in it. We all use the car key when we start the car. If there are two kinds. Part of it is the physical use of car keys. The other is the electronic car key. Electronic car key In our distance from the car, we can unlock the vehicle because the electronic car key has an electronic chip in it. And there's a little battery in there. You can unlock a car remotely from a distance.