(Photo is of 2 units, selling separately for $500 each) - 8 quality preamps, 8 instrument inputs, stereo output, headphone output, ADAT optical. A really great firewire interface. I have chained 2 of these together to get 16 preamps. $500 for each. For more details, see the Motu website: https://motu.com/products/motuaudio/8pre Everything is the same as the current USB version, but uses a firewire interface. If you buy both, I am happy to throw in a compatible firewire card for PC desktop or an old laptop firewire slot card. Excellent condition.