How do I configure my speakermic jack as a line in?

EOS R50 External Mic Issues mic slot A wideband and back radiation suppressed slot array antenna is proposed in this paper and the excellent design flexibility of both-sided MIC technology is microgaming slot demo 2) Buy a female to male plug splitter so each headset mic on the pc has a plug

microsdxc dedicated slot jack, and the red marked is External Microphone jack ) If you use an external microphone, please connect it to MIC IN port