Update via Dmitry in the comments: "it's not ANALOG"
via
this auction
"This instrument is analog polyphonic synthesizer with preset patches and midi. Midi in this machine is early 80s soviet standard midi protocol and it produce some latency if You cinnect to it to western machines. Please notice thius is not issue, but Russian-Western system incompatibility.
• It has a 3-octave keyboard, 32 timbres and 4-voice polyphony.

• HAS 32 VERY UNIQUE AND POWERFUL PRESET SOUNDS,4 VOICES POLYPHONY, UNISON MODE, MODULATION CONTROL AND OTHER FUNCTIONS.
• It features a unique set of electronic parts, reliable keyboard (41 notes C–E) made in magnetically controlled contacts; synthesis modules consist of independent boards, which is convenient for maintenance.
The synthesizer has a two-digit display for representing a preset number and some other system parameters.
• Connection on the rear panel : on/off switch, OUTPUT on standard 1/4''jack, Pedal inputs on standard 1/4 jacks ( cables included)r, power wire connection (220/240V)."