The Panasonic Whisper Control Humidity Sensing Fan Switch is the innovative way of automatically regulating your bathroom’s humidity and dew levels. With a Condensation Sentry sensor system, the switch automatically detects when there is condensation building up along the walls and fixtures of your bathroom, and automatically switches on. For customized regulation, there are manual on and off controls for your convenience. This switch control measures and anticipates rises in humidity levels based on dew point. This amazing fan switch is constantly working to check for condensation and humidity rises for automation and ease of use. The Whisper Control FV-WCCS1 is easily used in conjunction with your existing fan and includes a wallplate for easy and simple installation. The automation of this fan control system allows you to save energy and money at the same time by eliminating constant usage of your home’s bathroom fan. The Panasonic FV-WCCS1-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.