-Temperature Control Digital Control with two temperature displays. One display shows the set temperature, the other shows the actual temperature in the freezer.-Alarm System Battery operated alarm system will emit an audible and visual signal when there is a mechanical or electrical failure. The alarm has an over and under temperature setting, alarm silencing switch, and battery test switch. -Remote Alarm Relay A relay for a remote alarm hook-up is also provided. -Refrigeration System So-Low cascade type. Two hermetic compressors. CFC & HCFC free refrigerants.-Construction Chamber is 14-ga. zinc coated galvanized steel. Exterior is 16-ga. steel. Powder coated cool gray finish.-Voltages Available 115/60/1 - 208/60/1 - 230/60/1 - 220/50/1