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 Auto cool Is A Solar Powered Fan That Keeps The Interior Of Your Car Cool And Freshen Batteries Are Needed.Just Roll Down Your Window, Place The Auto Cool On It, And Rol..

Easy to fit and great to use 15 inch x 15 inch elastic strap secures backrest in placeVery durable and light in weightA must for people driving long hours and suffering back problemsBreathable mesh allows airflow for cool, comfortable useCan also be used in office chairs, sofas etc..