Our freezer has a digital control with two temperature displays. One display shows the set temperature, while the other shows the actual temperature in the freezer. The freezer has a battery operated alarm system which 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 batter test switch. Also supplied with a relay for remote alarm hook-up. The refrigeration system is cascade type with two hermetic compressors supplied with CFC- and HCFC-Free refrigerants. The chamber is 14-ga zinc coated galvanized steel while the exterior is 16-ga steel powder coated with a cool grey finish. ETL Electrical Approved. FACTORY INSTALLED OPTIONS AVAILABLE, PLEASE CALL FOR QUOTATION: · Recorder, 7 Day with 6? Chart · Recording Paper, 6; 50 Charts per Pack · Telephone Alarm System for up to 4 Pieces of Equipment · Access Openings, 1-2? I.D. · CO? Automatic Back-Up System · Liquid Nitrogen Automatic Back-Up System