MIFARE Classic 4K with 4 Kbytes of EEPROM read/write memory and is compatible with existing MIFARE infrastructures. Operating in accordance with ISO 14443A, MIFARE 4K functions at a distance of up to 10 cm with true anti-collision properties and without the need for a battery.

The MIFARE classic family is the pioneer and front runner in contactless smart card ICs operating in the 13.56 MHz frequency range with read/write capability.