Hello,
I considered a similar unit. Upon reading the specs I found the same(it
stated that it would only cool 25deg low that outside air temp). Pretty
useless I found.

Kenneth 
89 Cab
87 Vanagon
83 Jetta
87 of newer Golf wanted

> 
> Hello,
> 
> I received one of these as a gift a few years back.  Here in Phoenix the
> summer temperatures are 100+ every day.  At 100 degrees in the shade, no
> wind but in free air, the unit managed to cool 25 degrees steady state.
>  So, at 75 degrees internal temperature, it was pretty useless around here.
>  If the ambient temperature was 75 degrees, I infer that the device would
> cool to 50 degrees, which would be a lot more useful.
> 
> I gave the unit away.
> 
> Mike