At present, hotels usually plug in the room card after entering the room, so they often go out. As soon as they went out, the power was automatically cut off and the air conditioner was turned off. Wh

At present, hotels usually plug in the room card after entering the room, so they often go out. As soon as they went out, the power was automatically cut off and the air conditioner was turned off. What can I use instead of the room card? Now the hotel also knows that it is easy to waste electricity, so it can't be replaced by a card, because its power card slot has the function of a door card, and only the chip can be read to supply power. The principle is the same as opening the door with a room card. This effectively prevents guests from using other cards instead of room cards to get electricity.

If you want to go to such a hotel, unless you are given another key card that has been swiped and is available, or you leave the card in your room and ask the waiter to open the door before entering the room.