Published on Jan 15, 2017 FatNicK
Reminds me of the Gakken SX-150.
via this auction
"he Music Synthesizer kit lets you build your own little musical instrument. You can play notes over two octaves, including half tones (minims). Additionally, you can use the customisable sound effects, tremolo and envelope modulation, to give your compositions or interpretations a unique and lively sound. This is a self assembly kit that has been designed with the complete novice in mind.
Components in the box: 1 x main board, 4 x push buttons, 2 x LEDs, 1 x speaker, 1 x potentiometer with knob, jumper wire, 1 x battery box and fixing screws and nuts."
