GPS vehicle tracker 1.2 way conversation 2.fuel and temperature detection 3 geo-fence ... Detailed Product Description Can built-in RFID Reader with 2.4G RFID tag, SD card record (optional),Two ... built-in RFID Reader with 2.4G RFID tag, SD card record (optional) 2.Can connect external RFID Reader ... 24hr static, -130dBm)I/O port2 analog input ports, 6 digital input ports(2 positive input, 4 negative input), ...