Temperature and humidity affect the comfort of your home. When the air around you has too much humidity, your body can't regulate its internal temperature through evaporation. Too much humidity not only negatively impacts your comfort and health, but it can also impact your possessions. High levels of humidity can lead to mold and mildew. Overly dry conditions can irritate eyes, nose, and throat and negatively impact possessions like musical instruments and wooden items. Keep your home’s temperature and humidity at optimal levels with La Crosse Technology’s Data Logger Indoor Comfort Meter. Its easy-to-read display lets you know your comfort level at a glance. Log hourly, daily, monthly, and annual highs with the touch of a button. The Data Logger also displays current time in either 12 or 24 hour display, date and month, signal strength, and low battery. This attractive unit is free standing and runs on two AAA batteries.