AcuRite Indoor Humidity Monitor & Thermometer Model 00325 (Black) and Model 00326 (Blue)

It is very important to know the relative humidity in your home in order to control dust mites and mold, since both thrive in moist settings. In hot, humid months, the relative humidity should remain in the range of 40-50%, but it may fall lower in cold, dry months.
1-Year Limited Mfr. Warranty.

Product Notes:

• When the humidity level in your home gets below 50%, dust mites slow down.
• Humidity under 40% actually kills and eliminates them altogether because it's too dry for them to survive (except in your bed where it's always warm and humid due to your body - this is why bed encasings are so critical).
• If your humidity is high, you may need to consider a dehumidifier.-->

 Features:

• Check the humidity and temperature at a glance with the large, clear display.
• See fluctuations because this gauge continuously displays the high/low humidity and temperature for the past 24 hours.
• Easily check your indoor comfort level (humidity in relation to temperature) -- High, OK, or Low -- with the convenient graphic display of a house.
• Finding a good spot for this gauge is no trouble, because it has a built-in magnet or stands alone.
• Requires only 1 AA battery, not included. We offer batteries above for your convenience.
• This monitor lives up to its name in accuracy; the temperature has a +/- 2 degree variance and the humidity has a +/- 5% variance.

Dimensions: 3.5"H x 2.75"W x 1.75"D