1. Small in size and light in weight, facilitating portability and movement.
2. Without power supply, the heat preservation duration typically reaches several hours or even longer.
3. The box body is manufactured using food-grade materials, being non-toxic and odorless.
4. The original version has a hollow interior in the lid, and the interlayer of the box body employs common EPS foam. It can refrigerate for more than 12 hours, up to 24 hours, but cannot freeze.
5. The standard configuration version has the interior of the lid adopting PU polyurethane foam, and the interlayer of the box body uses common EPS foam. It can refrigerate for more than 24 hours, up to 36 hours, and freeze for approximately 2 hours.
6. The high-end version has the interior of the lid using PU polyurethane foam, and the interlayer of the box body also uses PU polyurethane foam. It can refrigerate for more than 48 hours, up to 72 hours, and freeze for about 3 to 5 hours.

Precautions:
1. Prior to use, the interior of the refrigeration box should undergo cleaning and disinfection to guarantee a clean and sanitary environment within, and to prevent contamination of the refrigerated items.
2. Do not overfill the refrigeration box to avoid influencing the circulation of cold air and reducing the refrigeration efficacy. Meanwhile, ensure there are certain gaps between the items to enable the even distribution of cold air.
3. When utilized in high-temperature circumstances, the heat preservation effect of the refrigeration box might be affected. Efforts should be made to avoid prolonged exposure to direct sunlight or high-temperature environments.
4. Promptly clean the interior and exterior of the refrigeration box after usage to eliminate stains, odors and bacteria. When cleaning, mild cleaning agents should be employed and the use of highly corrosive chemicals should be avoided.
5. When not in use, the interior of the refrigeration box should be wiped dry to maintain dryness and prevent the growth of mold and the emergence of odors.