Uht oh, I don't have, nor am I using that thingy to the left on the photo! I am afraid that that is a power injector.......or not? It is doing a beautiful job without that things anyway. AND the more I look at this thing, the more I believe it is universal and can either BOOST the signal, or PAD the signal!!!!! IF what I am thinking is correct, I could use this in conjunction with my CM7777!!!!!! OK, off to do more research.