Galvanized steel construction. Works with existing soffit intake vents to help remove damaging heat and moisture from the attic. More effective than roof louvers or turbine style vents. Helps prevent wood rot and extend the life of exterior paint. Eliminates related utility cost. Passes 110 mph wind-driven rain test. Power source - DC motor w/10 watt Solar panel, tested to withstand hail and foreign object impact for long-lasting operation. Brushless motor last up to ten times longer than traditional motors. Airflow (Cubic Ft. Per Min.) 500. Tilt and swivel design for optimal solar exposure. Extra-wide flashing helps prevents leaks. Includes remote solar panel mounting system.