... frequency: 125kHz, 13.56MHz 2) For access control purpose Product Description:EM9921,9960 RFID Keyfob Specification Model No. 9921/9960/9961/9962/9963 ... (125KHz, 64bit, R/O) Y I-Code (13.56MHz, 1024bit, R/W) Y Mifare 1 (13.56MHz, 1kByce, R/W) Y Temic E5557 (125KHz ... Management, Personal Identification,Car Park Control, Member Club Management, etc. rfid key tag-9921/9960/9961/62/63