[hurrens]

There are extra cables and plugs you can buy that allow you to link into the audio system.

The unit is about 12cm x 9cm x 5cm.

I don't think the cables are long enough to fit in the boot if you want to connect to the audio system.

I don't have an extra antenna as my unit uses the shark fin from the Sat Nav.

I had mine fitted by a local ICE company, which is why my answers are a little vague.