Traditional Culture Encyclopedia - Hotel accommodation - What can be used to replace the proximity key card?

What can be used to replace the proximity key card?

Inductive room cards can be replaced by various items with the same or similar characteristics, such as ID cards, social security cards, combs, cardboard, etc. As long as these items can produce the same magnetic field effect or have the same card swiping action, they can replace the inductive room card to obtain power in the room.