 It is the NeoKey BFF. This is a little best friend forever add-on for a QT Pi. So take your QT Pi, take your BFF, marry them together. This one allows you to take a Cherry MX compatible mechanical key switch. Plug that into the socketed receptacles for the two pins there. And now you have a mechanical key switch. I've put it in a very minimalist configuration with header pins. So it's just plugged right onto the bottom. It has a reverse mount NeoPixel, and then it has the sockets for a mechanical key switch to plug in. But you can see it in action. When I press it, it is glowing red, and it's also sending USB HID command to my broadcast software to bring on a delicious plate of gnocchi. It is the NeoKey BFF.