The Panasonic Whisper Control Humidity Sensing Fan Switch automatically regulates your bathroom’s humidity and dew levels with its technologically advanced condensation sentry and humidity sensors. This fan switch’s sensors detect rises in condensation and humidity levels to automatically activate the bathroom fan. This prevents condensation and moisture buildup on walls, fixtures and mirrors during changes in humidity levels such as showers. For easy usage and customizable regulation, the Panasonic FV-WCCS1-A also features a manual on and off switch. This fan switch can work with any existing fan in your house and includes a wallplate. The anticipation of humidity and condensation rises allows this fan switch to function on and off, reducing the need for a continuously running fan that can use a greater amount of energy. The Panasonic FV-WCCS1-A is featured in an almond finish and features a blue LED during function.This product is energy star qualified, UL/CSA listed and LEED & CALgreen compliant. Panasonic offers a 1-year limited manufacturer's warranty.