Ok so I sent it back. Here is their response.
We tested this tach, and it seems like the board is fried. It would not do anything, and it would not do anything. After looking at the tach we noticed the date code on the bottom was from 2007, and you purchased this in March of this year. There is only a one year warranty on these. We can not change out the movement as there have been revisions made since 2007.

Thank you

- thepartsplaceinc

Soooo. What does this mean? They think I'm trying to return a tach from 2007. I just got the car. They sent me this one. They said all they have are 2015 models. I think I talked him into the fact that this is what they sent me. We will wait and see if one gets sent