The miPASS KeyFob has an imbedded chip which is available in 1Kbytes of EEPROM. The key tag has a write endurance of 100,000 cycles. The Key Tag can support multiple applications on the chip, each with its own dedicated keys and memory area. The smart card chip is divided equally into 16 Sectors with 4 blocks and 16 bytes in each. The memory is be used for storing user data such as access code information or biometric templates. Each of these sectors contains 2 sets of security encryption keys labelled Key A & Key B, which only match the same keys on a BQT miPASS Reader.

The miPASS KeyFob is a practical substitute for the smart card as it allows you to use the Mifare technology without having to carry a card. The Key Tag and can be simply attached to a key ring, bag or belt.