This is interesting. At a basic level it's a blend pedal not unlike many others, but on this there is a 4 band EQ on the wet signal only, a polarity switch, and a contour switch on the clean.
There are a few demos with about 5 different drive pedals on their page and YT channel
https://www.damnationaudio.com/pedals/p/dirtfixer-bass-blender-and-equalizer
I'm quite tempted - I do like blending things a lot.