The hotel key card provides access cards for hotel rooms. Typically it is key card that use RFID (Radio Frequency Identification) technology. These cards contain a small chip that stores information, allowing them to communicate with the hotel's door lock system. General Overview Encoding Information: When a guest checks in, the hotel staff encodes information onto the chip in the access card. This information typically includes the guest's name, check-in and check-out dates, and room number. Communication with Door Lock: The access card communicates with the door lock using RFID technology . When the guest inserts or taps the card on the electronic card reader, the door lock system reads the information stored on the chip. Verification: The door lock system verifies the information on the card with the data in the hotel's database. If the information matches and the card is valid, the door lock grants access to the assigned room. Expiration: Access cards are usually pr