Polycom Vortex EF2280 8 Channel Telecom Conference System Matrix Mixer This was surplus from a community college. It powers on and I get several different displays when I play with the buttons. I don't have the cables or components to test this further. This does not come with an AC adapter. I tested it out with an adapter from a different unit. Everything that it included is shown in the pictures. At the time of this listing we have a quantity of these and so you may not receive the exact unit shown in the pictures but they are are pretty much identical in condition and all test the same. L3-3 fdk 80930218