The SET button will display the following screens      
"+"and "-" Buttons Allow You To Toggle Between Options.
Set LCD Brightness to 1 - 8 Set Wind Speed: mph, km/h, bft, knots, m/s
Set Time - 12h or 24h Set Rainfall to inches/mm
Set Date Set Air Pressure inHg or hPa
Set Time Zone
(Not available on the
Forecast Sensitivity Adjustment
Daylight Savings
(Not available on the
Storm Alarm Setting
Set Temp to
Pressure Alarm ON/OFF