Upon arrival, the guest proceeds to that room, and the keycard will open the door.
From the courier-journal.com
We pay for our electricity using a keycard which we load at the local shop.
From the guardian.co.uk
By the way, your room's keycard serves as your currency while you're in the Mouse nation.
From the kentucky.com
The check-out time had been extended but little did I know the keycard had been deactivated early.
From the couriermail.com.au
Locks, keycard systems, and static and dynamic bollard systems?
From the jobview.monster.com
The next time you stay in a hotel room, run your fingers under the keycard lock outside your door.
From the forbes.com
To enter, simply wave your keycard in front of the lock.
From the usatoday.com
Bonnie and I decided I'd use a keycard with a small limit.
From the couriermail.com.au
Showing a room, Krige demonstrates how guests get in by whisking a keycard past a panel on the door.
From the usatoday.com
More examples
A plastic card that has a magnetically coded strip that is scanned in order to operate a mechanism
A keycard lock is a lock operated by a keycard, a flat, rectangular plastic card with identical dimensions to that of a credit card or American driver's license which stores a physical or digital signature which the door mechanism accepts before disengaging the lock.