1.High quality cold rolled steel plate exterior,Stainless steel material interior,adjustable shelves. 2.Large LCD display,display many sets of datas one time,easy to understand and operate (Optional) 3.International Brand compressor and circulation dynamo,ensure the interior air equality. 4.The best international PID temperature controller,precision control temperature. 5.With timer function(0-9999mins). 6.Optional printer or 485 connector,USD data connector,can record and print the change of temperature.