Panasonic WhisperSense DC Ventilation Fan, 1-Phase, 50/53/80/83/110/111 cfm Flow Rate, 4 in, 6 in Diameter Duct, 120 V AC, 0.07 to 0.18 A, 60 Hz Frequency, 4/5.9/7.2/10.6/10.8/16.4 W Power, 13 in Grille Length, 13 in Grille Width, 10-1/4 in Housing Length, 10-1/4 in Housing Width, 7-3/8 in Housing Height, Zinc Aluminum Magnesium Housing Material, Ceiling Mounting, Yes Humidity Sensing, Yes Motion Sensing, Domestic/Import: Import