The TDSI 2920-3002 Mifare 1K cards are ideal for secure access control requirements. These PVC cards are incredibly sturdy, and each card has a unique serial number for easy issuance. The cards are compliant with ISO/IEC 14443A standards and have an operating frequency of 13.56 MHz.Available in packs of 100CR80 card size (86 x 54mm)Compliant with ISO/IEC 14443A standards