PCR340 Triple interface Card ReaderPCR340 is a simple to use device applying dual 125Khz and 13. 56Mhz RFID technology to read the unique serial number of the RFID card. It is good to be used for the system access logon logoff key and the system operator identification, such as POS system logon logoff and operator identification authorization with RFID card. PCR340 is a perfect system logon key which can protect the system and prevent the unauthorized people from using the system.