Okay I have 2 questions.

1. Is it possible just to puy an expression pedal without having to get the whole thing? Like just the pedal?

2. What does a volume pedal do?
An expression pedal without "the whole thing?'

Do you mean like... a wah pedal?

And a volume pedal just turns your volume up and down. Cool for volume swells or even just silencing your guitar between songs.
Electrolytes Smell Like Semen...
1. Last time i checked, an expression pedal is, just a pedal?

2. A volume pedal raises and increases your volume at your control.
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what do you mean by just get the pedal?

and a volume pedal is simply a rocker pedal that changes the volume of your guitar- you can build one for cheap.
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