La Crosse Technology WS-7013U Instruction Manual page 8

4. A minute will now be flashing.
Press and release the SET button
once more and you are done.
PM hours. During the AM
hours this area will be blank.
b. When the correct hour is
shown, press and release
the "SET" button once.
a. Press and release the
"MIN/MAX" button until
the correct minutes are
displayed.
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