I did some searching, but didn't really find an answer to my question. Is there a way to add a UI element to 'sleep' the F series 900BT unit? I ask because I deliver pizza, and while my keyless entry and remote start lets me leave the car locked and running when on the road, when I pull up at the shop, I turn the car off. It takes a few minutes - well maybe not that long, but long enough to notice, for the unit to power up again. It has the 12v constant and ignition source. I was thinking about putting in a 12v bypass switch so the unit remains on when I turn the car off, but that also me