How does this connect to an iPad Air 2 for projection?

The technical information indicates an additional cable is needed to use this with an iPad Air 2. But how is that connection made? I haven't yet purchased an iPad Air 2, but am interested in being able to project apps in the classroom. Which cable is needed and how is the connection synced?

Miroir HD Projector MP150

Miroir HD Projector MP150

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