USB in and SPDIF out via either RCA, BNC or Toslink. Also has a headphone jack.
I am including both the optional rechargeable battery power supply, plus a HUGE linear power supply that can also supply 12V power to another device if needed. I used it for my Trends T-amp at one point and it sounds as good as a SLA battery with cap bank. The PS is not completely enclosed, I had it hidden behind other stuff so it wasn't a big deal... just a FYI in case you have kids.
Asking $125 for everything + shipping. The power supply was about $50 and the converter goes for $225 with battery pack.
Here is the 6 moons review:
http://www.6moons.com/audioreviews/trends4/usb.html
