Generally speaking, car keys are divided into three categories: mechanical keys. Remote control key and smart key. The mechanical key is the opening and closing of the car door, including starting, which is controlled by mechanical manual; the remote control key is electronic remote control for opening and closing the car door, and the mechanical manual control is used for starting the car; the smart key is used to control the opening and closing of the door and one-button start through the induction chip in the key. What most drivers now use are generally remote controls and smart keys.

When a vehicle leaves the factory, it is generally equipped with two car keys. If possible, you can take out a spare key. But if the car owner does not have it with him, he can use the spare mechanical key hidden in the remote control key or smart key to open the door.

In addition, cars that can be started with one button are generally equipped with a sensing area. As long as you find the key sensing area reserved in the car and put the key on it, you can also start the car with one click.