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RFID cards are typically the standard credit card size (85.6 x 54 mm), making them convenient for guests to carry and use.
Cards can be customized and printed, including hotel logos, room numbers, and other information to enhance brand image.
Standard cards are suitable for most hotels and for both temporary and long-term guests.
How Do RFID Hotel Key Cards Work?
A typical RFID Hotel access system includes several components:
RFID Hotel key card
Hotel door lock
RFID card encoder
Hotel lock management software
Hotel property management or access control system
When a guest checks in, the front desk system creates the appropriate access permissions.
The RFID card is encoded with the credential data required by the Hotel lock system. Depending on the system design, this may include information relating to room access, validity periods and other access permissions.
When the guest presents the card to the door lock, the reader communicates with the chip and determines whether access should be granted.
Different Hotel lock manufacturers use different credential technologies and system configurations. Therefore, two RFID cards that look identical on the outside may not be interchangeable.
This is one of the most important points for Hotel key card buyers.
What Frequency Do RFID Hotel Key Cards Use?
Many modern contactless Hotel access cards operate at 13.56 MHz and use technologies based on ISO/IEC 14443.
Common chip families used in access-control credentials include MIFARE products such as:
MIFARE Classic
MIFARE Ultralight
MIFARE Plus
MIFARE DESFire
There are also Hotel access systems that use other credential technologies.
For this reason, frequency alone is not enough to determine compatibility.
For example, two cards may both operate at 13.56 MHz but use different chips, security methods or system configurations.
Hotels should always confirm the exact credential requirements of their lock system before ordering replacement cards.
Which RFID Chips Are Used in Hotel Key Cards?
Several RFID chip families are commonly encountered in Hotel and access-control applications.
MIFARE Classic
MIFARE Classic has been widely deployed in contactless card systems for many years.
Common versions include:
MIFARE Classic 1K
MIFARE Classic 4K
MIFARE Classic-based credentials can still be found in many installed Hotel access systems.
When replacing cards for an existing Hotel, buyers should confirm the exact chip specification rather than assuming that any MIFARE card will work.
MIFARE Ultralight
MIFARE Ultralight products are designed for cost-sensitive and high-volume contactless applications.
They provide a relatively simple credential platform and are used in a variety of limited-use contactless applications.
Different generations of MIFARE Ultralight products offer different memory and security features, so the specific chip version matters.
MIFARE DESFire
MIFARE DESFire is designed for more advanced secure contactless applications.
Depending on the version, DESFire products can support features such as AES-based cryptography, multiple applications and more sophisticated credential management.
These capabilities make DESFire attractive for access-control environments requiring stronger security or multi-application functionality.
The important purchasing lesson is simple:
Do not select the RFID chip based only on price. Select it according to the Hotel lock system and credential specification.
