Sony microphone cable/phone cable, 2.3m. It appears that some parts of the plug on one side are missing, but the details are unknown. The original condition is unknown, and it is not designed to be screwed in, so it is not known whether a shell covers it. The plug and cable are not fixed, so pulling the cable may cause it to come out, and care is needed when handling it. Continuity is not a problem, but it is sold as-is.