PCR330 is a simple- to- use device applying 125Khz HID 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. PCR330 is a perfect system logon key, which can protect the system and prevent the unauthorized people from using the system.