C. Crane Versa WiFi USB Adapter II - Manual (Page 5)

Versa WiFi USB Adapter II Page 5
Tips About Using WiFi
If you are new to WiFi, you may need to know a little about
some of its properties before getting started.
WiFi signals will not pass through everything. Basically, any
material that is dense will reduce a WiFi signal dramatically.
This includes aluminum foil, brick, bathroom mirrors, trees,
hardwoods, and, of course, any kind of metal.
At longer distances beyond 100 feet, any obstacle that is
slightly blocking (including a tree branch) will greatly deteri-
orate the WiFi signal by as much as 90%. For best long dis-
tance use, position the Versa WiFi USB Adapter II so there
are no walls or obstacles between it and the sending an-
tenna.
In our “real world” street test, we achieved a good WiFi sig-
nal at more than one half of a mile away from a normal
wireless router. This test was done in the middle of a road
with no obstructions.