Easy to install: first attach the exhaust fan to the car glass. Second, make a sun punishment towards the sun. And then install it with long adhesive strips and short adhesive strips. the instruction manual (English language not guaranteed), avoid leaving any marks in the window. It can be used continuously on rainy days. Es ist einfach zu installieren und von gro?er Praktikabilit?t. Electronics/K¨¹hlgebl?seWide application: helps to eliminate pet and tobacco gers, solar panel, adjustable at multiple angles, can effectively absorb sunlight. Sustainable use in rainy days.Double power supply: with solar panels, double channel and double motor design, the exhaust speed is effectively improved. Solar and battery switch control, can control the solar battery used separately. When you do not use the battery, you can rely directly on solar energy to absorb sunlight and convert it into electricity so that the L¨¹fter works. Electronics & Photo/Car Vehicle Electronics/AccessoriesClean Air Environment: It can help eliminate the peculiar smell of the leather pads of new cars, the sweat smell on the steering wheel and the buttons, the smell of passive smoke and the toxic gases emitted by cars. It can keep the air in the cars fresh and provide you and your family with a healthy and comfortable environment. r/audio video accessories/installation accessories for vehiclesSafety and environmental protection: when using solar panels, no power supply is available to charge the battery. Solar power and battery switches can control the use of solar cells separately. When no batteries are used, sunlight can be absorbed by solar energy and converted into electricity and make the L¨¹fter work. Use solar energy, clean energy, reduce environmental pollution. Installation accessories for vehicle electronics