That looks to be the wifi dongle that is plugged into the back of the radio unit to enable the Rand McNally navigator wifi function. (Weather, traffic, gas station location and prices etc). It was not provided with our 2016 45AT - I had to purchase and fit it myself. Also, does your display show outside temperature? This is another option that Thor decided not to supply to us in their 'flagship' coach. For $49, one can buy the temperature probe and spend an hour or two fitting it. PM me if you would like full details of what to do.
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