Solar Powered Attic Fan - harness the energy of the sun and use it to cool your attic heat - proprietary high-performance 12V DC fan designed for high CFM output and low noise - lightweight polymeric fan blade design reduces motor resistance for increased performance and reliability - corrosion resistant and auto-closing vent shades - boost air ventilation by installing this solar attic fan in your old existing vents - no electrical hook-up, just plug the fan into the solar panel and it will work whenever the sun shines onto the solar cells - help save energy by harnessing the sun's power to help ventilate your home to further reduce your heating bill Kit Includes: One 12V 5-watt photovoltaic solar panel (7 7/8" x 6 1/2" x 15/16") One 12V DC Ventilating Fan - Vent Frame Dimension: 8 9/16" (length) x 8" (width) x 4 5/8" (depth) - Fan Specification: 5 3/8" (diameter), 3Watt, 2200RPM