You can read all about this version on GitHub, but here’s the gist — you’re looking at a split keyboard with dual macro pads, rotary encoders, and a built-in trackball. And oh yeah, there are pedals, too. Those are a whole other thing.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/05/28/keebin-with-kristina-the-one-with-the-auto-harp-typewriter/