Types of car remote keys

There are roughly three types of car remote control keys: externally mounted, foldable, and built-in. Different models have different styles. There is also a type that is not equipped with a mechanical key, which is more common in models with keyless entry/start functions.
In addition to the above three types of keys, there are some models with keyless entry/start functions. This model does not have a mechanical key, nor can it be started by conventional means. Relatively more troublesome.
Regardless of the type of car key, with the protection of the car key shell, it will be relatively cleaner and more durable to use.