It uses the Sony XA 110iP - so if your Sony headunit is older than 2006 range or doesn't have an AUX input etc. and you don't want wires hanging out the front of your HU its a cheap way of hooking up your iPod without having to resort to crappy tapeplayer adapters or radio transmitter gubbins - as it wires directly in to the back of the HU using the CD player jack.
The iPod fits perfectly in the armrest (I have mine in a carry case too for added protection and a nice snug fit) - so is hidden out of sight and the wires are easy to route down through the armrest pillar, and the adapter box fits perfectly under the plastic/rubbery tray next to the handbrake.
Anyway - just thought I'd share that in case anyone is looking to do something similar.
