It's an evolution of the TBK - the author is trying to build the endgame of dactyl manuform.
Features (mostly same as dactyl manuforms):
split compact ergonomic keyboard
keywell and column-staggered
same layout as a dactyl manuform Mini
per-key RGB (optional)
low profile
comes with QMK and online configurator
tenting base, 30 degrees (optional)
Anti-slip pads
Technical details:
will come in DIY kits and prebuilts
flexible PCBs
ribbon cables, M4 torx screws and inserts
USB-C on both sides (using elite-C and open-sourced Shield PCBs)
audio jack
custom 3d printed case, .15mm layer height prusament galaxy black printed on prusa mk3s
Print settings
Printed at .15 layer height with a .4 nozzle, with prusament galaxy black on a prusa mk3s and mk3s+.
Having a clean design for the 3d file helps a lot (this was really hard using the dacman code but much more feasible in CAD) (more details & close-up).