Received my 2730 today (Thanks John!), plugged into my existing tourtech mount and garmin audio/power cable, turned it on and everything worked including the sound (sound to both sides of the helmet via audiocom). Don't know if it's in stereo but both sides work and that's all I cared about.
Now... off to activate XM.. Had my heart set on listening to Howard Stern's B.S. via Sirius but really, I just want to hear something while riding so will find something else to entertain me so XM will work.
Thanks again John! EXCELLENT deal and the device looks as good as new (I understand they are reconditioned but you can't tell)