It says it needs a 12 volt outlet with a 12 amp rating or more and it will work.
There may be some type of technology that maximizes the input voltage internally. I have no idea how it works. Just seen this, and it is the only one I have ever seen that says it can plug into a 12 volt outlet.
Finding the right trucking company is like finding the right person to marry. I really comes down to finding one whose BS you can put up with and who can put up wih yours.