Deep freezer manual series products are applied to places needing storage at constant temperature, such as hospitals, blood banks, scientific research institutions, colleges and universities, genetic engineering, entrepreneurs, etc. Safety System: 1. Perfect alarm system with buzzer sound and lamp flashing alarm functions 2. High temperature alarm & Temperature sensor failure alarm 3. Multiple-protection function (Password protection, power-on delay, time between stops, refrigeration system operation protection during sensor failure) Control System & Display Microprocessor control, LED display Audio & Visual Alarm High or low temperature alarm ;Sensor failure alarm Refrigeration Type Optimized auto-cascade refrigerating system Refrigerant Unique fluoride-free mixed refrigerant, CFC-Free Condenser & Evaporator Optimized evaporation and condensation system, strong cooling and low energy consumption