The Panasonic FV-WCCS2-W Light Switch offers users the ease of mind of automatically activating a bathroom fan when humidity and condensation levels rise above preset levels. When humidity and condensation levels rise (in cases like during a hot shower), the fan switch automatically activates the fan after 5 seconds of humidity change to ensure proper and full ventilation when necessary. With its constant regulation of humidity levels and automatic activation, the need for a continuous running fan is eliminated, therefore saving energy and money. This fan switch works in conjunction with any existing bathroom fan. This product also features a multi-functional on/off switch for both manual control of the fan as well as a lighting unit for better regulation and customizable ventilation. For ease of installation, this fan switch comes with a preset wallplate, and can be coupled in a multi-ganged junction box. With the Panasonic FV-WCCS2-W, you can have the convenience, the rapid response as well as the nominal savings The Panasonic FV-WCCS2-W is available in a white 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.