Range can be affected by many factors, such as how far the video transmitter is installed from all the other electronics, type and position of the antennas in use, the height of the receiver's antenna, heavy signal broadcasting around the area of operation, trees and buildings. High frequency signal such as 5.8 GHz can be affected by clouds or even high humidity in the air.
As already briefly mentioned, the type of antennas used with the system is a major and important factor that make huge difference on the performance of the integrity of the signal, and reception quality.Since there are so many variables involved, it would be impossible to determine specifically what range each FPV each setup and installation will have.