... RS232 ,RS485,RJ45Output PortGPIO outputReading RangeDepends on antenna gain,connect 12dBi antenna, the reading distance,above 8 mLED IndicationLED ... 1-LED7 , LED 1-4 shows working status , LED ... working , LED 7 shows power statusSignalBuzzer and LEDAntennaOne-Four antenna ,TNC ConnectorPower SupplyDC+9V(Supply AC/DC power adapter ...