CLAIMS AND DATASHEETS.

The article comments on the tendency of ISM band wireless module manufacturers to give inaccurate information on their operating range. The actual, achievable, range of wireless data link can be unpredictable. In theory, a path loss can be calculated and relate to the performance of the radio components and get a range. In reality, the actual propagation will be vague. Factors such as the curvature of the earth and the proximity of the ground can affect the propagation of the radio waves.