It's for my Behringer ECM8000 measurement mic, it's a 48V phantom power/external sound card type thing. Ever since the UMIK fiasco and the faulty mics/correction files I decided I needed to put more effort into making the Behringer more reliable and easier to use and since I bought it from cross spectrum I know it's accurate. Now I just need to figure out what to do with the two UMIK's I have. I could send them to cross spectrum and get correction files for them, but that would be about $150 for both. Decisions decisions.