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Hello Dan, thanks a lot for reply. Can you send me link to that discussion, please? I sent mail to Dahua support.

Hello. I have Dahua NVR4108HS-4KS2 and two cameras IPC-HFW1230S. Cameras don't have built in mic nor audio connector to connect external microphone. Receiver has two female RCA connectors, labeled Mic IN and Mic out. I have external microphone from link below: 0.39ï¿¡ 85% OFF|Audio...