Unit is fully functional and was used in smoke-free studio racks only. Just some scratches from taking it in & out of racks. Comes with the manual! This is a very versatile device. The dual solid-state preamps sound great on about anything - I've used them for Drums, Bass, Guitars, Vocals, you name it. Yes, also Akkordeon ;-) Front: 48V phantom power, switchable per channel; the dual Aux inputs can handle anything from a passive guitar pickup to a low impedance keyboard output (thanks to a selector switch and a gain knob); it has dual balanced Line inputs (great, if you want to use it as an outboard compressor or character maker. Yes, it distorts if you want it to!); high-pass filters per channel; both channels are stereo linkable, the soft-knee compressor has the usual Threshold, Ratio, Attack, Release, and Gain Makeup features; the Meters can be switched between signal or gain reduction. Rear: balanced outputs, switchable from +4dBu to -10dBu; there's sidechain insertion points (a low-cut for the compressor, anybody?); it also has unbalanced ins & outs... So, it covers a lot of ground!