key fob
US /ˈkiː fɑːb/
UK /ˈkiː fɑːb/

1.
брелок, ключ-пульт
a small remote control device that allows you to lock and unlock a car or other vehicle without using a key, and often to start the engine or open the trunk remotely
:
•
I accidentally locked my key fob in the car.
Я случайно запер свой брелок в машине.
•
My car's key fob needs a new battery.
Брелок моей машины нуждается в новой батарейке.