Keep your position car cool and fresh with the Acool car Ventilator. featuring an innovative look, this device draws in outside air and expels hot air out. using a four fan system, Acool replaces all of the air within your car double in only 5 minutes. in addition, each ventilator sports a custom made look for every car. giving a muster fit for your rear door window, it doesn’t need any trimmings or rubber strips to seal your window tightly. Providing triple protection, the ventilator does it work while keeping your car safely closed. Moreover, Acool: gets it to power from a 50W solar panel or from the 12-volt power receptacle in your car. Complete with an air cleaner, Acool only draws clean air in.