See the picture for a Clarion back (having the same radio in multiple cars makes it easy to remember which button to push to answer the phone)..

Besides the regular multiple connector for power and speakers that connects to the XF harness (lower right and not plugged in) there are also wires with plugs on the back for rear subwoofer (L&R) Front audio preamp, aux in (L&R)*, external mike, usb*, antenna*, SirusXM, wired remorte. (I use the ones with * but not sure about value of USB.

All of these wires make quite a lump in back of the radio & suspect can move another 1/4" into the dash if I cut off the unused ones.

That said the sound, particularly CDs ripped at max (192) on my cell phone, is far better than satellite and as good as any radio I have.

Currently have over 300 albums on my cell phone using about 15.7GB on a 32 GB microSD card. No matter which car I get in (and some friends) all are available. And Torque Pro and GPS with current traffic. One cell phone plan to rule them all.

ps that is a neat clock but does it have bluetooth ? (my usual engine display includes a clock)