I have two of them, IN use, However there is a problem.. Carrier stopped making them, They are Carrier Air V's (well one is, the other has been, er.. Modified) and as a result they are now hen's teeth.
There is someone who advertises a "Web Thermostat" in theory you coudl remote this puppy from a smart phone... That's all I know about it too. Do not know if it is RV compatable.
Home is where I park it!