*Feature:4 hours of heat insulation,12 hours of reservation,2 hours of timer *The materials of tray and stockpot is food grade 304 stainless steel.shell pp plastic *Function: steam,steam pot ,hot pot,boil *Our heating principle is that a small part of water is heated by using an energy-gathering ring, and steam is quickly generated within 30 seconds. *steam tray can individe into holes and middle pipe,and the steam is transported from the pipe in the middle of the tray,which heat conduction is better. *Avoid the smell mixed