Features: Easy to InstallThe fan is powered by a solar panel. It is easy to install, just connect the interface of the solar panel and the fan and put it under the sunlight. Convenient and Portable Small Size, Easy to carry around. No Batteries Needed, Green energy, great for the environment, keep the air flowing. Widely UsesSolar Powered Fan Ventilator perfect for Pet house, Chicken Coops, Treehouse, Dog house, Greenhouse, RV, Touring Car, Camping, etc. Solar WorkingThe solar panel runs the fan fast under direct sunshine. the solar Fan will work more slowly or stops working when the sunshine is weak. Our fan is special solar and working with long service life and energy saving. Specification Colour: Black CFM (cubic feet per minute): 200 CFM Max Fan Speed: 3000 +/- 10% Ratedvoltage: 12V Solar panel: 10W Solar panel Size: about 27x17.5cm / 10.6 x 6.9 inches Fan Dimensions: about 12 x 12 cm / 4.7 x 4.7 inches Packing list Style 11 x Solar Panel2 x Fans Style 21 x Solar Panel1 x Fans