Decker is a simple FMV EQ, similar to the tone stack of many classic amplifiers. It is also equipped with a volume control that can compensate for volume changes caused by the equalizer.
The kit is designed to be used as a stand-alone pedal!
This kit contains all necessary parts, except the pcb: Parts list
You can order the pcb form Kurt Ballou: God City DIY PCBs
Knobs for the pots are not included in the kit, you can select them yourself. The 5 pots have round 6.3mm shafts.
Here´s the build documentation: