Features: -Solar powered, the fan only works when the sun shines directly on the solar panel. When the sun is weak, the fan will work slowly or even stop working. -With a double-layer metal protective grille to ensure the fan can withstand shock and perform in harsh outdoor environments. -Hot air can be exhausted and cold air can be brought in, effectively reducing the indoor temperature and keeping the air fresh. -Easy to install. You just need to connect the solar panel to the fan and put it in the sun to use it. Solar panels and fans must be fixed to solid walls or roofs. -High quality weatherproof motor design, prevent rain from short circuit or damage, suitable for outdoor use. .