This is my travel board of tone. I mainly stick to plugins for effects.
The Nano Cortex is there just so I can capture and share tones I have nailed down, to give me a few effects when need a little something, to give me headphones out, and to act as a digital interface. I still haven't decided if it is a keeper.
The Notaklön is there for tone and volume boost more so than distortion.
29 EUNA magic box of mystery.
The Enigmatic's tones and a thing of absolute beauty.
I am currently obsessed with one of the tones I am getting from it. It is one of the 50w (almost) clean presets plus the 29 (always on), the Notaklön set clean, and just a touch of reverb on the Cortex.
Dumble was a genius and I can't thank UA enough for giving me the chance to play with one before I die. I know it is just a model, but a UAFX is as close as I'll ever get. The same goes for the Marshalls in the Lion 68.
It's a buffer with a charge pump and three switches that drop different passive EQ filters into the circuit.
From what I can tell from the reverse engineered schematics it's a dual sided op-amp buffer (as opposed to something like a transistor based jfet buffer), kind of like what a klon uses, three passive tone filters built around dropping different cap/resistor combos into the circuit, an "effects loop" aka a buffer bypass for anything that misbehaves when the guitars output impedance is changed before the effect (range master, germanium fuzzes), and an overbuilt power section with an unusual amount of power filtering (there are so many electrolytic caps in this part).
I will not comment on whether I think it's worth the pricetag.
It might be placebo effect, but I just love how it makes my main guitar sound. Is it essential? No way. Most musicians have been playing just fine without it, but I had the means and I really wanted to support the builder.
The peg toggles (aka 'stomp switch') towards the bottom of each are designed to turn them on and off (or load a preset) with your foot on the fly. The dials are adjusted before the performance.
I didn't ask why it was posted. I asked about the functionality. You should be able to understand that I didn't know exactly what a guitar pedal was. Rather than leaving this post with 0 activity and googling it, I thought I'd ask OP to talk about this thing they are clearly proud of.