With Auto Cool Solar Powered Fan even on the hottest days, your parked car is kept cooler and the air fresher thanks to this solar-powered vent fan. Auto cool does not work on tinted windows. It maintains a safe, comfortable temperature level for your return. Place Auto cool vent on top of window, then close window and lock up. It's solar panel uses sunlight - not the car's electrical wiring or batteries - to power the built-in fan. Fresh air is drawn in as hot, stale air vents out. Auto cool even helps to eliminate pet and tobacco odors. Auto Cool Installs in seconds and fits windows on all makes and models. Manufacturer's details may vary. Additional Details ------------------------------ Product description: With Auto Cool Solar Powered Fan even on the hottest days, your parked car is kept cooler and the air fresher thanks to this solar-powered vent fan. Auto cool does not work on tinted windows. It maintains a safe, comfortable temperature level for your return. Place Auto cool vent on top of window, then close window and lock up. It's solar panel uses sunlight - not the car's electrical wiring or batteries - to power the built-in fan. Fresh air is drawn in as hot, stale air vents out. Auto cool even helps to eliminate pet and tobacco odors. Auto Cool Installs in seconds and fits windows on all makes and models. Manufacturer's details may vary.