Ambient Weather Support

The indoor temperature, indoor humidity, and outdoor temperature can be reset every 24 hours (based on when the batteries are inserted), or never.

Press the High / Low Record button (on the back, #4 below) to switch between reset 24 hours or never.

The Hi/Lo icon will appear on the display. Make sure this icon is on.

To reset the highs and lows, remove and reinsert the battery inside the console. If Reset 24 hour option is selected, the highs and lows will reset 24 hours after the battery is inserted.

Product Manual
https://ambientweather.com/mwdownloads/download/link/id/507/

Product Page
https://www.ambientweather.com/amws0270.html