The Panasonic FV-MSVK1 SmartAction Motion Sensor is a module created for the WhisperGreen Select line of fans. Panasonic WhisperGreen Select fans can be customized by adding one of the brand's patented modules. Once installed, a fan with this module has innovative and convenient automated motion settings. For one, the Panasonic fan with this SmartAction motion sensor will automatically activate when a person enters the room. It also activates an automatic 20 minute delay off timer. Other modules for WhisperGreen Select fans include multi-speed with time delay, condensation sensor and a NiteGlow LED night light.