(New, but old stock) Thermo Revco UGL2320V -20°C Freezer, 659L capacity, 4 adjustable shelves.  Freezer features microprocessor control system, gravity air circulation, industrial quality cabinet construction, and extra-strength refrigeration compressors selected for industrial, clinical and scientific use. Audible/visual warnings for over temperature, under temperature and power failure, with visual status reports on critical functions. Graphic thermometer confirms proper operation at-a-glance, shows normal, high or low temperature condition; steady green for normal, flashing bulb for under temperature. Enlarged digital display, resolution to within 0.1C, improves visibility. Alarm silence, ringback and automatic reset functions.