RFID & NFC RFID antennas, NFC antennas The RFID and NFC antennas are used to receive signals of a particular type of frequency. Accessories Alphabetically (article code) Most popular Less expensive first Most expensive first Kathrein ARU 2400: RAIN RFID Antenna Reader Unit, 865-868MHz int. + 3 ext. Ant., PoE, GPIO Kathrein ARU2400, the RAIN RFID Antenna Reader Unit, is the powerfull reader with an innovative connection concept