that is only achievable in the best conditions with no line-of-sight obstructions

Maximum range/No Sight Obstruction; Medium Range/Partial Obstruction to Line of Sight; Short Range/Major Obstruction to Line of Sight."

or wherever there are lots of line of sight obstructions

Finally, although it isn't reflected anywhere in Amazon's sales copy/photos, Midland's outer packaging includes a pretty clear disclaimer/graphic about the effect of line-of-sight obstructions on operating range, one that I think is accurate/fair: