Update 5/5/2015: We have discovered that an SD card DOES work in the slot after all! But we are still befuddled about the USB port. The manual clearly states: "Connect a USB device to the black USB input connector on the back of the unit." I have no intention of taking anything apart on this brand new, expensive thing, so I have a email for Dual. I sent them photos and explained my dilemma. Hope they respond with something simple and don't make me feel too stupid!
Sharon n Gary, no kids, no pets
Both happily retired | 1st time RVers 2015!
2015 Coachmen Freelander 22QBF | 1980 Toyota truck toad