Temperature range Ambient +5°C to 250°C. Heating elements are placed in ribs at the bottom and sides. Double walled inside Stainless Steel. Outside Mild Steel painted in epoxy powder coating/ stainless steel with wiremesh adjustable shelves, two indicators and on/off switch. To work on 220/230 volts A. C. With OR with out one number Air circulating Fan & Microprocessor based PID temperature controller.