Modinity olar Powered Ventilation Exhaust Fan, Solar Powered Car Window Cool Air Vent Auto Fan Car Interior Fan  (5 V)

The solar panels on the outside collect and use the sunlight to run the fan that's on the inside. When you come back to your car, you'll find it comfortable and cool. How it works AutoCool is a solar powered fan that keeps the interior of your car cool and fresh.No batteries are needed. Just roll down your window, place the Auto Cool on it, and roll it back up. The solar panels on the outside collect and use the sunlight to run the fan that's on the inside.