Shutter Design -- The shutter fan automatically open when there is air and close fully when there is no air to prevent smoke, dust, wind and rain from entering. Perfect Ventilation Solution -- The solar powered fan is equipped with 8 Inch high-airflow fan. A perfect ventilation solution for greenhouses, chicken coops, sheds, pet houses, RVs, attics, garages, work shops... Reduce the room temperature and effectively enhance air circulation. High Airflow Fan -- The high speed fan maximizes airflow While reducing noise and power consumption. The fully enclosed motor is also permanently lubricated and fitted with double ball bearings and is rated for 50,000 hours of operation. AC Adapter & Long Cable -- An additional AC power adapter ensures sufficient power to run the fan even on rainy and cloudy days. Also, the wiring is long enough to facilitate your layout and installation.