via this auction"this is a 19" rack-mount clone of the classic Roland TB-303 synth but with added MIDI input ,,, controls for VCO Tune ,Wave , Auto-Tune ,, VCF Cutoff ,Resonance, Env Mod ,, VCA/VCF Accent ,, Env Decay ,, Master Volume ,,,, rear of unit has connections for Midi In , VCF In for processing external sounds on 0.25" jack & Sound Out on 0.25" jack ,,, comes with original instruction leaflet and 12V AC power supply"
