I think that's just the factory iPod Adaptor. I would assume it wouldn't be too hard to install, just plugs into the HU. As for how it works, the factory adaptor requires you to use play lists, and locks your iPod while plugged in. You can't browse artists or albums, only move back and forth through a play list.
I wonder if it actually puts the Mazda logo on your screen, that looks pretty sweet.
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