Per the manual, the default temperature for freezer mode is 0° F (-18° C) and swings +/- 10° F (+/- 6° C) and for refrigerator mode is 35° F to 46° F (2° C to 8° C). I've only had this for 2 weeks, but when I spot check the freezer it's between -7° F and 9° F. I guess the swing means it does not have to start and stop as often. For comparison it only runs about 25% of the time that my old unit ran, so I expect quite an energy savings (on top of the recent sale price, my utility Energy Star rebate, and selling my old unit to my utility). If you want to see the manual, go to www.insigniaproducts.com and search "NS-UZ14XWH7" under Support/Service.