Thanks for responding. By untethered I just mean from my helmet speakers to some com unit. The GPS and radar detector are the only two devices going through a com unit and all will be be wired to the bike for power. The radar detector will be wired to the com unit and the GPS could be either bluetooth or possibly wired to the com unit. I don't care about rider/passenger intercom or phone. What I'm looking for seems minor compared to having several peripheral devices, intercom, and phone. But I don't have much experience with this stuff, hence my plea for help.