Condensation Sensor helps control bathroom condensation to prevent mold and mildew. Sensor detects relative humidity and temperature to anticipate dew point, automatically turning the fan on to control humidity. Built-in Relative Humidity (RH) sensitivity adjustment enables fine tuning for moist conditions and for satisfying CALGreen requirements. Moisture Sensor or Condensation: Yes Night light: No Multi Speed with time delay: No Motion Sensor: No Type: WhisperGreen Select Condensation Plug 'N Play Module