Car key fob (or remote key / remote keyless entry key)
This is a standard automotive key that combines a traditional metal key blade with a plastic remote control (fob).
The metal blade is used to manually unlock the doors or start the ignition (in older vehicles without push-button start).
The black plastic head contains two buttons:
Top: Lock (closed padlock icon)
Bottom: Unlock (open padlock icon)
These buttons send a radio signal to the car to lock or unlock the doors remotely. A small hole at the bottom is typically for a keyring.
This style was common on many vehicles from the late 1990s through the 2010s (before fully keyless systems with flip-out or proximity keys became widespread).