Product review (2 stars): Does not cool below 46F
As someone else mentioned, the description claims this cooler maintains a temp of 40F.  However, my cooler does not cool lower than 46F, which is not adequate for safe food storage.  The USDA recommends 40F or below to safely store food.  My wife took this with her on a week long trip, and found on the 3rd day that some food was already spoiling.  When she returned from her trip, I tested it the temp with my temp equipped multi-meter in my air conditioned home for 6 hours, and the temp never dropped below 46F.  Returning for a full refund, as the product does not work as advertised.