crwdns2934241:0crwdne2934241:0 S W

crwdns2934249:0crwdne2934249:0:

I am guessing because it is a stereo microphone, one is left, one is right, the 3rd is ground. I would suggest asking customer support on monoprice.com for a extension stereo audio 3.5mm and see if they can find out if there is a ground wire.

crwdns2915684:0crwdne2915684:0:

open