Something a little different, part of my retro music tech collection. This is the Yamaha QY10 and it's honestly a beast. It's a full featured MIDI workstation that runs on AA cells and just about fits in your pocket. For an idea of its power, this introductory video is an hour long and doesn't give you time to follow along:
I used mine for a while as the centre of my dawless setup, controlling a Commodore 64 (via MSSIAH), a Yamaha DX 7, and a Korg Wavestation. Now I mostly carry it as a music sketchpad.
It came from Japan and still had a truly awful piece of music on it from the original owner that I will never delete.












