La Crosse Technology WS-7213U Instruction Manual page 20

2.
To view the Minimum/Maximum
temperature: first select from which
remote temp/humidity sensor to read
data from (indicated by the "boxed"
number). Pressing and releasing the
"MIN/MAX" button will toggle
through the minimum and maximum
indoor temperature, and the minimum
and maximum outdoor temperature.
3.
To reset the Minimum/Maximum
readings, press and hold the
"MIN/MAX" button for five seconds.
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