Korg AX3000g Expression pedal question before purchase

[Seanie280672]

Hi guys, I'm kinda new here but definitely not new to the world of effects, I've been offered one of these units by a friend of a friend fairly cheap, I've read some reviews and watched some YouTube videos, and although its quite an old unit now I'm still quite impressed, however there is a couple of questions I have before I buy it which none of the videos etc seem to cover, I guess someone who has one or had one can answer.

What I would like to know is, has the expression pedal got a switch built into it to switch the wwh on and off ?

I know this can be done via the control pedal, but if the expression pedal has a switch then this frees up the control pedal for other effects.

One final question, when the wah effect on the expression pedal is off, what does the expression pedal do ? Is it a volume pedal or can you assign it to be a volume pedal when wah is off or is it just a dead pedal and does nothing.