Assertion: multiplexer's input | /r/HasProperty | listener-ports
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Source sentences:
text: The QK-A031 is a very sophisticated NMEA 0183 multiplexer & combiner that has three NMEA 0183 inputs (listener-ports), one SeaTalk1 input, one NMEA 0813 output (talker-port), a WiFi interface and a USB port to connect to host devices.