This must be the most boring a/b/y pedal ever made! Completely predictable and unobtrusive, it works and sounds just the same whether plugged in or not - dead silent. Enjoy picking out your LED colors because that's the most excitement you'll ever get out of it. I'm buying a second for another amp. Great Gear!
I use it for switching between instruments. Like the colors, Amber for A, Blue for B and Y for Yellow. Nice and bright. Silent, even at volume. Took a while to get here, but I'm happy. I wish they made some simple volume pedals, like with a mini knob. Anyway ... this was a good purchase and I highly recommend.