Very simple one button for volume.
I use this with a Harmony H75, 1967 The effect of date about the same era is INCREDIBLE! I play on a Peavey Classic 30 Lamp. The pedal really boosts the sound without the sublime has dnaturer is hot with the grain. Sustain that I earn my opinion that lacked a bit scratched. Jai the impression of playing with a Gibson whore! The pickups are DeArmond Harmony of this very good! I had this pedal for 140 euros. I do not regret the choice I had a bit of heart in trying it. That's exactly what I was looking for my solos.
Report quality normal price for a vintage effect and given the quality of stuff to put the price c is normal. 140 Euros