UltaPlay(TM)Solar Power Auto Car Window Fan Auto Ventilator Cooler Air Vehicle Radiator vent hot selling 100% Brand new and high quality! Solar-powered and no batteries needed The Auto Cool uses sunlight to keep your car air clean while you're away. When you come back to your car, you'll find it comfortable. How it works-Auto Cool is a solar powered fan that keeps the interior of your car air clean .