The UniFi Access Card is a highly secure NFC chip card ( 13.56 MHz ) compatible with the UniFi Access system. The card is encrypted using both AES-128 and a patented security mechanism of UniFi Access. These additional security measures protect the card number from misuse and duplication. The package contains a total of 10 cards . Supported Technologies • ISO/IEC 14443 Type A • MIFARE DESFire EV2 • UniFi Access Proprietary Security Protocol