 During the cooking process the food does not need to be monitored or stirred because the pans use waterless cooking methods and the induction heater uses alternating pulses to control the heat, so the liquid in the pans continually revolves in a circular motion.The RFIQin pans are built with a vapor seal that enables the pans to use techniques of pressure cooking.The portable induction heater and cookware can be used in a manual mode as a regular induction heater.