2 PC-BestAir HG050 Humidity Monitor Portable Hygrometer

To ensure the proper humidity levels in your home. Too much humidity or not enough humidity can adversely affect many household items. Use of a hygrometer inconjunction with humidifiers can allow you to properly monitor and regular your indoor humidity levels. Measures indoor air humidity levels; Can be used with any brand of humidifier; Colored area shows optimal comfort humidity levels; No battery required.;