Herboven Decarboxylator--- Your Special Tool Dedicated To The Decarboxylation Of Herb/Botanicals and Herb oil infusion.We make 250℉(121℃)-65 minutes / 300℉(149℃)-35 minutes/180℉(82℃)-65 minutes as the default setting due to there are 5 minutes of preheating and 20 minutes of cooling down in each heating cycle.