Plantronics Headset Microphone Adapter Plug - PL-40931-01!
NEW - sealed in bag with instructions
Ensures a stable fit for the PC soundcard cord PL-28959-01
This adapter connects the 3.5mm microphone plug on the 28959-01 PC cord to the soundcard's microphone jack on your computer
Also compatible with the Plantronics CAT132 computer headsetI have 4 of these so can do a deal for mulitples