... Special Features: 1.Can built-in RFID Reader with 2.4G RFID tag, SD card record (optional) 2.Can connect external RFID Reader, Cameras, Printer ... )I/O port2 analog input ports, 6 digital input ports(2 positive input, 4 negative input), 3 digital output ports, ... ports and 1 mini USB port two way communication car gps tracker,vehicle gps tracker with optional RFID card reader,LCD,Camera,DVR supporting