2 Bose X with little black boxes

I recently acquired several headsets in a purchase I made from a flight school that went out of business. In the items were several nice headsets. I use Bose X, but 2 of the headsets I got were Bose X, but they are for a special plug in, I think for Cirrus, and they have a little square box on them, instead of the normal power button on the Bose X I use with dual plugs on the end. Are these for Cirrus and what are they worth in good shape? Anyone interested before I put them on eBay? Blake in Alabama blakemathis@yahoo.com