keyremote
nounUK /ˈkiː.rɪˌməʊt/
US /ˈkiː.rɪˌmoʊt/
A small thing you press to lock or unlock a car or door from far away.
Dad pressed the keyremote to open the car doors.
OTHER MEANINGS
2. A device that sends a signal to open a garage door.
She kept the keyremote in the car to open the garage.
3. A small handheld control for a TV or other machine.
He used the keyremote to change the channel.
4. A button on a key that locks or unlocks something.
Press the keyremote twice to lock all the doors.