The Accucold® VAC Series zers are specially designed to store sensitive medical and pharmaceutical materials under the proper conditions, with innovative construction for temperature stability and user-friendly features for added convenience.The FS24LVAC is a compact all-zer designed to reach -20º C, the i temperature for long-term storage of select sensitive materials. The 1.4 cu.ft. manual defrost interior static cooling for stable results. A removable wire shelf allows easy storage options, with a seamless interior liner to simplify cleanup. This unit has a flat door liner as by the CDC.For optimum temperature assurance, the FS24LVAC includes a digital thermostat and a high/low temperature alarm with a NIST calibrated temperature display to the nearest tenth of a degree. A hospital grade cord includes a 'green dot' plug for added safety in high traffic settings, while the self-closing door ensures stored items aren't accidentally exposed to room temperature. This model comes in a white finish and includes a factory installed lock. A pre-installed probe hole/access port allows users to install additional monitoring equipment. NOTE: Accucold zers are purpose-built to the support meeting the current CDC (Centers for Disease Control) guidelines for the storage of vaccines. As referenced in the current Vaccine Storage and Handling Toolkit, these units incorporate several key features for stable operation. For additional temperature assurance, the CDC recommends a calibrated digital data logger (DDL), which can be added with the factory-installed option DL2B or addition of the DL2BKit accessory. Select Accucold products have been tested and to the new NSF 456 standard, and are now available for purchase. For additional information, contact our products specialists.