1. High efficiency and heat dissipation: The solar panel is very efficient in dissipating heat, so your car is no longer hot, and it can also eliminate toxic gases in the car at high temperatures. 2. Easy to install: First, hang the exhaust fan vent on the window of the automatic door. Second, make the solar sun toward the sun. And then install it with long adhesive strips and short adhesive strips according to the instruction manual, avoid leaving gaps in the window. 3. Reduce the internal fuel consumption of the car: Reduce the cooling time at high temperatures of the vehicle, reduce the cooling fuel consumption and reduce the aging speed of interior parts. 4. Lightweight and practical, easy to use: Folding for easy storage. 5. Perfect in use: The high-efficiency vortex exhaust fan rotates at 3500 revolutions per minute. And it doesn't need the power supply inside the car, only solar energy or batteries. Specifications: Name: Car Exhaust Fan Speed: about 3500 / min Input / output