key fob
US /ˈkiː fɑːb/
UK /ˈkiː fɑːb/

1.
키 리모컨, 스마트 키
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.
실수로 키 리모컨을 차 안에 잠갔어.
•
My car's key fob needs a new battery.
내 차 키 리모컨 배터리가 다 됐어.