The main features of the operating environment: No special requirements box structure: polypropylene coated steel cabinet paint, an outside door, insulation materials within a separate inner cover, located on the bottom right side of the compressor, the control panel is located on the top right side box principle: compressor cooling heat exchanger. Function Description: Panasonic MDF-1156 ultra-low temperature freezer is mainly used to store medical biology active agents, including biological agents, biological enzymes, nucleic acids, tumor tissue, bone marrow, bacteria and viruses, monoclonal antibodies, sperm and fertilized eggs, etc. . These biological materials only in a stable long-term cryogenic environment in order to survive and remain active. The ordinary household refrigerator or commercial refrigerators can not achieve and maintain a stable temperature of -150 degrees Celsius. Role: Long-term cryopreservation of active biological material