Double walled, inside chamber stainless steel, outer body made of CRC/G.I. - powder coated, Temp. Range from ambient +5° C to 60° C controlled by Dual Display Microprocessor based Digital Temp. Controller with +/- 0.5° accuracy, Humidity range from atmospheric humidity to 95 % controlled by Dual display Microprocessor based Digital Temp. Controller (Dry and Wet bulb method) with + 3 % RH. Inner water tank made of stainless steel with ball cock valve. Front door has a full view glass observation window.