What Is This?

[gordizmom]

Hi all. I'm not exactly new but I don't post much on here. I didn't know where else to post my question.

I was cleaning out my SUV today and noticed this box thing with the clip. What is it? It's on the driver's side. Also, I had no idea the metal is rusty. Weird.

 

[1955moose]

What year and model do you have?

Sent from my N9131 using Tapatalk

 

[gordizmom]

2000 Expedition Eddie Bauer.

 

[Boostedbus]

Looks like the OBD 2 connector