so with the "Rocktron Banshee Talk Box"
do you talki into the tube ore what...
i mean what the heck is the tube for?
You just move your mouth to the words, but you dont actually talk.

The signal runs from your guitar to the talkbox, and then the sound from the talk box runs through the tube, into your mouth where you manipulate the sound by moving your mouth. The sound is then picked up by the mic and run through the PA.
the tube goes into your mouth. On the other end is the speaker which sends the guitar sounds into your mouth. You shape sounds with your throat and then it goes out your mouth.