Korg MONOTRON 16-Key Synthesizer

VCO (Sawtooth) with Pitch control; VCF with Cutoff and Peak controls
Space Delay with Time and Feedback controls; LFO with Waveshape, Rate, and Intensity controls
Ribbon Keyboard with extra-wide four-octave range; keyboard glows under blacklight
Original MS-20 Filter with aux input allows the filter & delay to be applied to any source
Built-in speaker, battery power; graphics that glow under black-light