Note: Auction links are affiliate links for which the site may be compensated.
via
this auction
"Basically, the MS-02 is a handy CV/Gate Utility.
LOG AMP Hz/V-to-Oct/V Converter
ANTILOG AMP Oct/V-to-Hz/V Converter
ADDING AMP CV Adder
TRIGGER PROCESSOR (x2) Trigger Converter & Reverser
JUNCTIONS Multiples
Control Voltage converter for Korg MS-series synths (and others using Hz/V control) to work with devices using the more usual Octave/V system (and vice-versa).
1. LOG AMPLIFIER
Tuning / Width / Hz/V input (0~15V) / Oct/V Output (-12V~+12V)
2. ANTILOG AMPLIFIER
Tuning / Width / Oct/V input (-4V~+4V) / Hz/V output (-12V~+12V)
3. ADDING AMPLIFIER
Channel 1 level control / Channel 2 level control / Input Channel 1 / Input Channel 2 / Output
4. TRIGGER PROCESSORS x 2
Trigger indicator / Reverse switch / Input (Vth=+2.5V) / Output (0V~+15V)
5. OTHERS
Power switch / Pilot lamp
6. JUNCTIONS
4x2 / 3x1
7. DIMENSIONS
283 (W) X 110 (H) X 195 (D) mm
8. WEIGHT
2.2kg
9. POWER CONSUMPTION
Voltage (local voltage - 50/60Hz) / wattage (5W) / 240v with Australian Standards plug."
"Hardware 17 track step sequencer with MIDI, Analogue Clock in/out and 7 Analogue trigger outs. Limited edition black edition from 2013 in good working order. 
