It may not be the most elegant macro keyboard in the world, but it allows wireless (bluetooth) and physical (USB) connection and shows the functions of the keys in a very legible way without consuming battery.
Some components need to be soldered.
I've printed it with a 0.6mm nozzle but I guess any other will do.
The small recess at the bottom of the keyboard is for storage so you don't lose a Bluetooth device in case your computer needs one.
Necessary electronics:
The author marked this model as their own original creation.