... connect Detailed Product Description Can built-in RFID Reader with 2.4G RFID tag, SD card record (optional),Two- way conversation, can ... : 1.Can built-in RFID Reader with 2.4G RFID tag, SD card record (optional) 2.Can connect external RFID Reader, Cameras, Printer ... output ports, 4 serial ports and 1 mini USB port GPS vehicle tracker, built-in RFID Reader with 2.4G RFID tag, SD ...