... for diabetics 1.battery ensure 12 hours working time 2.small, lightweight 3.2-8 Celsius, antifreeze Dison portable cooler for diabeticswas designed ... . Refrigerated medicine storage is needed for Autos, Trucks, Boats, RV’s, and Motorcycles, as well as outdoor activities.Dison portable cooler ... hours working while no vehicle power or household power.3. 2~8'C under 25’C, keep insulin safe for 30 days ...