FORCED AIR CIRCULATION. DIGITAL ELECTRONIC CONTROL OF TEMPERATURE AND TIME. HOTCOLD A-B-C ADJUSTABLE TEMPERATURE FROM 0 °C TO 50 °C. HOTCOLD UB-UC ADJUSTABLE TEMPERATURE FROM -10 °C TO 50 °C. FEATURES: Exterior case, door and interior made from AISI 304 stainless steel. steel shelves, PVC laminated. Reversible door which can be opened by either side, with easy to change the lock and the joint, manual lockout. Hermetically sealed compressor with anti vibration mounts with fan forced evapora- tion unit with ventilated condenser Homogeneous internal temperature by forced circulating air. Refrigerant R134 for models B and C. Refrigerant R404 for model UB and UC. Two safety power sockets. Two external ports for external connections. Temperature calibration. Adjustable timer. RS-232 Interface output for a computer, printer or USB adapter. CONTROL SYSTEM: Programmable graphic display of temperature and time. All operation modes are programmable in up to 5 cycles and each cycle can be programmed at 1 hour inter- vals. These cycles can be repeated indefinitely or can be manually finished. Up to 5 different temperatures can be programmed into each cycle. All parameters can be stored. A temperature safety thermostat comes as standard.