... , RFID reader connect Detailed Product Description Can built-in RFID Reader with 2.4G RFID tag, SD card record (optional),Two- ... mode Special Features: 1.Can built-in RFID Reader with 2.4G RFID tag, SD card record (optional) 2.Can connect external RFID ... 2 positive input, 4 negative input), 3 digital output ports, 4 serial ports and 1 mini USB port GPS vehicle tracker, built-in RFID Reader with 2.4G ...