This is one of my favorite items from the Magiro line, I have used my own many times in front of an audience and it is fun. This come around seldom so if this may interest you I recommend you do not hesitate.
A card is selected and returned to the deck. The deck is inserted into a stand to which a hose is attached. Magician blows in hose like crazy, nothing happens…. When a spectator blows in the hose a card rise from the middle of the deck, it is the previously selected card.
Interesting is that the air flowing into the hose is actually activating the rise. Of course the card could rise when the magician blows into the tube and for hygiene reasons you may want to do it this way or provide some sort of mouthpiece (not supplied).
Instructions are in German, I am including very short English notes that will guide you in the right direction.
As seen in the picture the hose has some paint on it, the hose is not gimmicked and could be easily replaced if this bothered you.