“Casio CZ-1 Synthesizer. Keyboard and pitch/mod wheels work and it generates sounds just fine, but the buttons at the top work some of the time (hard presses sometimes register). I had this connected to my computer via MIDI and did everything I needed remotely, so this was essentially an oversized sound module. Slider knobs for Chorus and Volume are missing, and there is a sticker covering melted plastic on the case.
I am listing this as “For parts or not working” so maybe it will work fine in your setup!” Click here to search for synths on eBay