I bought this probably 2 years ago. It's been great, but I've moved on to another solution.
This unit is 100% functional. The case is about 5x5x2 and the board can be taken out if you're looking to integrate. It has some light surface scratches from being inside my dash.
I believe the output around 3v RMS (1.5v per channel). It uses a standard USB A-B cable, no power required.
Here is a nice review and some specs
I'm asking for $50 shipped, or a trade for a fusion brain
If no luck here it shall go to ebay.
Thanks for looking and please don't hesitate to ask questions!