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!