With highly accurate temperature readings (±5%RH and ±1°C ) and a wide temperature range from 30°F to 122°F (0°C ~+50°C), humidity range from 20% to 99% RH, the humidity meter is the best resolution for monitoring the indoor humidity and temperature, indicating the professional indoor comfort levels to the family. Not only are there reliable readings, the temperature and humidity monitors can also record the MAX/MIN temperatures and humidity of the day, allowing you to compare current readings with previous readings. The warm Smiling Face Icon to remind you of the comfort level (DRY, COMFORTABLE, WET) in the room based off the humidity. So it is the best choice to keep you and your family's living conditions optimal. Smiling Face Icon The three smiling face signs give you an intuitive sense of the weather. Let you easy to know the weather is Dry, Comfortable or Wet. Backlight Function: Button-control & Sound-control The blue backlight is bright and makes the screen easy to read in low light when activated, and automatically turns off after 8 seconds. The "ON S/C OFF" button is for the Sound-control function. In the "ON" state, if any sound is received by the home humidity monitor or you touch it, the light will automatically light up for 10 seconds then turned off. To turn on the light when in the "OFF" state, press SNOOZE/LIGHT. How to set date, time and alarm mode To set ANY function, make sure you are seeing that function displayed Hold down the "mode" button for a few seconds until that function screen is blinking. Set desired function, and then hit the "mode" button again to advance to the next digits in that setting. When you are finished with the updated numerical digits, hit the "mode" button one more final time, and then set up successfully
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