Custom numpad. The MKI shares the same ATmega32A and matrix layout as the newer V2 PCB (not to be confused with the MKII, which uses an ATmega32U2!).
Make example for this keyboard (after setting up your build environment):
make kbdfans/kbdpad/mk1:default
Flashing example for this keyboard (after setting up the bootloadHID flashing environment)
make kbdfans/kbdpad/mk1:default:flash
Reset Key: Hold down the key located at K00, commonly programmed as 0 while plugging in the keyboard.
See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.