Studio reverb/multi-effects processor, true stereo (well built), midi control, sampler, I/O attenuators, full bandwidth, 24 bit signal, 48 bit processing. Near perfect, low use condition. I was a Digitech dealer years ago. This unit is as new, used occasionally in my home synth studio. It has minor update to correct signal level into reverb DAC. It now can do +14dbm operation with 6db better noise floor. Most Digitech products of this era were IVL based designs, truly a remarkable reverb which bettered Lexicon for the money spent. It does some excellent multi effect, multi tape echo, flanging etc. with wide enough bandwidth, dynamics to be effective on my concert grand piano, etc. Most pros didn not give digitech enough credit. Very reliable machine.