Wintec Industries WBT-200 - Manual (Page 5)

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Part 3
Safety notes
GPS (Global Positioning System) is provided by the United States
government. Its accuracy may varies depending on special
conditions (area at war or if it is blocked). Any control by USA will
affect this system and its accuracy.
If installed on the transportation device, driver must not operate
this while driving.
GPS performance is affected when satellite coverage is degraded
as near a high-rise building, in the tunnel or under a cover.
Personal replacement of components and re-structuring of this is
prohibited and may result in loss of legal usage.
Operation of this device is strictly prohibited in highly explosive
environment such mining, in-flight or other unauthorized area
against use of this.
Avoid exposing this at places of high temperature and humidity.
Return to original dealer immediately if it emits strange smell or
fume.