Sharper Image Hadrons SN004 Instructions Manual page 14

Weather Station Head H1 or H2
In order to "predict" the correct weather, you must set the approxi-
mate altitude of your location because the atmospheric pressure
varies at different altitudes. Press the SET button. The barometer
changes to the altitude of your location. To adjust the altitude of
your location, press UP or DOWN accordingly. After setting the
altitude, press SET once to return to normal barometer display.
Note: The limits for the altitude settings are from -325 feet below
sea level to 6,55 feet above sea level (-m to 1,m).
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