OK, I have posted some pictures of the Garmin iQue 3500 Sat Nav I have installed in my car. The cell phone mount holds the unit. The power and speaker are in the lighter.

The pictures do not do the unit justice. If you want to get all the specs, here is the link:

www.garmin.com/products/iQue3600

An external antenna is available, but I have not needed it. The internal antenna works just fine. I usually get a good signal from at least 4 satellites.

I am really happy with it.