Technics SH-GE90 Digital Signal Processor (DSP) / graphics equaliser.
6 Pre-programmed equalisation curves:
Heavy, Clear, Soft, Vocal, Headphone and Car.
6 Pre-programmed simulated listening environments:
Hall, Live, Disco, Church, Stadium & Theatre.
5 user-defineable sound qualities (EQ curves or SLEs).
Dedicated terminals for amps with pre-out/in connections, and tape in/out terminals for amps without.
Graphic equaliser bypass.
Multiple display modes inc Bar, Peak Hold, Aurora and combined EQ curve/Analysis.
Twin microphone inputs for karaoke function, with key and reverb control.
Supplied with a power cable, 2 sets of RCA cables
and a laser-reprinted, bound & covered manual.
Has some scratches and marks to the fascia (primarily the control knob)
and case, but these obviously don't affect functionality.
I've never used the MIC functionality and am unable to test,
but everything else has been retested as 100%.