Jian ya na Portable Insulin Cooler Refrigerated Box / Drug Reefer / Small Refrigerator CE& ROHS 3 types power workable: DC12-24V; AC100-240V; 3.7V battery 2~8'C under 25'C,keep insulin safe for 30 days under ambient 40C Large LCD display,show the time and refrigeration temp clearly,interchangeable between C and F Antifreeze function, Environment friendly:Using thermoelectric refrigeration Temperature displaying:F degree and C degree, Easy operaton,2.5 inch LED display