Our solar powered auto fan easily attaches to the top of a roll-up window to keep your car cool while you're away. Cool down, effectively reduce the temperature inside the car.Detoxification: Excessive temperature will release 20 times the amount of toluene (Toluene toxicity can lead to miscarriage in pregnant women and blood cancer in children) Deodorization: Remove odors in the car and keep the air in the car fresh.Heat dissipation: There is no sultry feeling when entering the car for the first time. HEALTH: Air convection helps you and your family enjoy a non-toxic and harmless riding environment. Protection of electrical appliances: The electrical and electronic equipment in the car will affect its performance and service life due to high temperature. Energy saving: When the temperature inside the car is not high, the air conditioning effect will be effective after each driving, cooling the vehicle and saving fuel. Using monocrystalline silicon solar panels, no batteries required.