Given so many phones and other devices charge off a USB cord, it would be nice to add a few USB outlets in the kitchen and cabin and eliminate the need for a DC to USB charge adapter.
OOPS! I meant to say it was NOT a GFCI. I revised my post.I may have linked to the wrong version of the outlet/USB plug. They do make a NON-GFCI version - we've got several in the house.
But you are right, to use these in the camper you'd need shore power, so their use would be limited.