It does 90 degrees below ambient. It's a full compressor type refrigerator/freezer, not the more affordable peltier type cooler.Related question - how well does the cooler work in such extreme heat?
Mine says it only works to about 40 degrees below ambient, IIRC.
That would only be 90 if it's 130 - nowhere near cold!
I would leave the windows cracked on those days too, so that would drop the temperature at least 10-20 degrees inside the car.