The door and key use RFID, and when a pet with a key comes close, the door reads the pre-programmed code. If it's the right code, it will open. When the panel is closed, it acts as a security door. It has a safety to prevent it from closing if something is in the way, thus a pet's tail or paws can't get stuck in it.
It is easy to program the door, and easy to add keys for more than one pet. One can also choose how long the door should stay open.
Visit the PlexiDor website to learn more!