Each unit is 8 XLR inputs and three XLR outputs (one direct, two transformer isolated). I have been using these as XLR splits for a portable IEM rig.
Depending on the way you configure your rack, this could be a more efficient option than the regular Art S8. Won't chew XLR connectors like the Behringer MS8000. Transformer isolation for noise mitigation makes this a superior option to the passive Y-style splits you get from Seismic, etc... not to mention the reliability of these units.
Each sells new for $399+tax/shipping. These Art units are the standard that venues expect when you show up with your IEM rack.
This is fully functional and in very good condition. I'm looking for $250 each or $450 for the pair.