THREE (3) POLE?

I've gave the headphones I use on my smartphone a try on my Madison and was pleasantly surprised at the quality of the sound coming through the headphones as opposed to the two external Cobra 500 speakers I use. Problem is that the headphone wire is very short. I'd like to purchase a 6 foot extension cord. There are so many choices. I just want to make sure I purchase the correct one. Is the plug in the photo considered a three (3) pole jack? View attachment 28954 Thanks. PS. If you've...

THREE (3) POLE?