hi i need some information please

can anyone tell me what the effect is that slash uses in anything goes from appetite, i think he also uses the same thing off of velvet revolvers new album. in the video it looks like he is blowing into something wich changes the guitars sound but im really not sure

please help

its a talkbox.
google it for images
Keep On Rockin´

Ibanez GRG-270
Roland Cube30X
Zoom G2.1u
Talkbox. Peter Frampton uses one in the new Geico commercial, and Joe Walsh uses em alot as well.
the tube sends the soundwaves into ur mouth, then, the sound comes out into the mic in different shapes and sounds depending how your mouth is shaped
ah that would explain whats going on in the video i saw, it looked a bit strange but makes alotta sense now