HP Multi-protocol Proximity Card RFID Reader. Used in GOOD WORKING CONDITION! HP proximity card readers are designed for customers seeking to leverage their existing card system for applications beyond physical security. Users can count on easy, error-free identification on both newer and older printing and imaging devices. With the plug-andplay functionality of HP card readers, no additional software is required once you have installed HP Access Control Professional in your network environment. The HP Common USB Proximity Card Reader and HP Common CF Proximity Card Reader are engineered to work with many protocols ? and HP offers four additional proximity card readers to offer specialised support for specific classes of cards.