... AC/DC/BATTERY work 12 hrs 2~8'C,antifreeze,LCD display Dison diabetic portable refrigeratoris lightweight and small, support battery ... traveling, outdoor activities, or bussiness trip, or don't want to store insulin in a share fridge in school, work place ... keep insulin safe for 30 days under ambient 40'C4. Large LCD display, show the time and refrigeration temp clearly, interchangeable between 'C ...