I believe you're right on that. It's a bridge box and CPU mounted under the hood, which processes the signals and whatnot. The CPU will send an alert to the detector to let it know what's going on. I believe it is compatible with all Max series detectors. If it's not BT enabled from the factory you'll most likely have to use a BT power cord. I just wanna see how Escort is going to waterproof all the components for a life exposed to the elements. Cool concept, but like always I'm skeptical. I'll believe it when I see it.