Efficient Air Circulation Our car window exhaust fan features a unique suction air duct design that enhances air circulation, quickly expelling hot air and exhaust gases from your vehicle. Experience a cooler, more comfortable interior environment during hot summer days or in stuffy conditions. EnergySaving Design Equipped with a power solar panel with lightcontrolled drive for energy efficiency, plus USB power backup option for cloudy days. This versatile fan keeps air flowing without draining your car's battery, making it ideal for both short trips and long journeys. AllSeason Freshness Maintain a fresh atmosphere in your car regardless of weather conditions. This ventilation fan allows for continuous air circulation even during rain or when windows must remain closed, creating a pleasant environment without compromising safety or comfort. ThreeSided Surround Suction Featuring an innovative threesided surround suction mechanism that effectively maximizes airflow throughout your vehicle. Specifically designed to target hot air pockets, providing cooling and ventilation precisely when you need it most. Use scenarios On hot summer commutes or in stuffy urban traffic, use the fan to expel hot air and improve interior comfort. During long road trips with windows closed, rely on continuous airflow to maintain freshness without draining the car battery. In rainy conditions or cloudy days, use the solar panel with the USB backup to keep air circulating without sacrificing safety or reliability.