fully detail : when u put ur car under sun light the car`s body get warmer , as a result of this the interrior of the car get more warmer due to metallic body , and then platic stuff like dashboard , etc
which make car interior make more warmer , as their is no ventelation , due to strict isolation by rubber attachedon the edges of door ,the air then .. there is no way to escape m simply this device is run by solar chip cell ( i guess not sure by battery)
this fan work as an exhaust , the temperature of outer area will be quiet similar to inner area of car , no equal but some how little warmer ,but much much better then sealed car kept under heat (sunlight)
, as biological view there is an always effect on human body , the sudden rise and fall of temperature of air which is being breath by human being is harmfull
thats why we are not suposed to drink cold water immediately after working hard(in sweaty position) , or get into AC room suddenly after coming from outside
hope ur brain has fried up
thank to geforce lolz