Do you know what's this module?

behind the rear seat there is this box, any ideas what it is?

thanks

 

inverter for the power outlet in the bed?

 

i have heard it is part of the towing package. I have read where some people just have a wire stubbed out of there with no module. Its on all taco's with towing i assume.

 

Thanks for your comments.
The Taco has the towing hitch so I assume it came from the dealership with it.
I'll check where those wires go from the box.