Excellent Condition, with power cable. S/N 003009 Korg Opsix FM Synthesizer, At the heart of every sound is Opsix s Operator Mixer a simple set of six faders and knobs that invite exploration, quick access to the parameters, powerful Effects processing.FeaturesAnalog SynthesizerQuick access to the parameters via knobs and faders37 KeysFull range of analog-style filtersPowerful Effects Processing