Vintage 1978 Muson Synthesizer Sequencer SN 41486 w/ Original Box

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via this auction

"Fully functional vintage 1978 Mego Corp Muson Synthesizer, with original box.
All the sequencer pegs/pins are included and has no battery leaking inside of the battery slot.
Everything is in working condition, the box is in fairly good condition for its age but still has seen better days, as well as the label on the front of the synth which has slightly discoloured from age.
[As seen in the pictures]

This is a really rare and sort after toy synthesizer which is capable of making some pretty incredible experimental video game/arcade, robotic, spacey sounds.
The internet description going around for this thing says: ''Kind of a ROLAND TB-303 but much cooler & cheaper - still cheaper...''

The box says:
"The sound of music. An electronic and music synthesizer. You can play a tune or make the strangest sounds in the galaxy.

Play dozens of simple tunes on the piano-type keyboard. Or make strange and spacey rhythms on the color-coded electronic board. Play them together for Rock 'N Roll sounds, eerie sounds, or outerspace electronic music. Separate slide levers, change the pitch and tempo. Experiment with thousands of combinations of sound. "

Description:
The coloured buttons can be used to change the melody and rhythm. Each color has a different note.
The speed and pitch of the sequence can be changed with sliders on either side of keyboard.
The coloured pegs/pins above the keys operate the built-in sequencer. Each colour represents a note on the keyboard.
The keys play just over an octave of whole notes.
A unique vintage music toy from 1978.
Requires 4 - C batteries that are not included (placement of batteries go under the 'Muson' cover on top of the machine."