The Panasonic Whisper Control Humidity Sensing Fan/Light Switch features a humidity sensor that detects both condensation and humidity changes in the air quality of your home. This switch automatically activates a fan when there are climatic changes that influence condensation. The fan switch has a 5 second delay to ensure proper and full ventilation when conditions are necessary (condensation on mirrors). With its constant regulation of air humidity levels, the need for a continuous running fan is eliminated; therefore cutting costs and saves energy. The FV-WCCS2-W features a manual on/off switch for both the fan unit and a lighting unit for many multi-functional applications. This fan switch works in conjunction with any existing fan and includes a wallplate, therefore not requiring any new accessories for installation. The Panasonic Whisper Control can also be coupled with multi-ganged junction boxes for easy and simple installation to a wide array of installation applications. With the Panasonic FV-WCCS2-W, you'll be sure to enjoy automated regulation of humidity and ventilation, while saving money and energy. The Panasonic FV-WCCS2-W is available in an almond finish and features a blue LED when functioning. This product is energy star qualified, UL/CSA listed and LEED & CALgreen compliant. Panasonic offers a 1-year limited manufacturer's warranty.