2. Observe the correct polarity and install 2 AA batteries.
3. Replace the battery cover.
Note: Immediately after the batteries have been installed, each LCD (Liquid Crystal Display) will flash and a tone will sound. Within a few seconds the indoor temperature, indoor relative humidity and the weather icons (sun and clouds) will be displayed. If not, then remove batteries for 10 seconds and reinstall. If the outdoor temperature is not displayed within four minutes, remove batteries from both units, wait 10 seconds and reinstall. The time will show
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