Basal Algorithm • Determines basal insulin requirements • Eliminates need for user to set basal rates • Adapts continuously to changing insulin needs • Develops and continuously updates basal rate profile for insulin delivery (288 automatically determined basal segments a day) Corrections Algorithm • Automatically adds insulin beyond basal insulin requirements • Reduces insulin when needed to help protect against hypoglycemia • Eliminates need for user to determine timing or size of correction doses • Adapts continuously to changing needs • Eliminates patient error regarding stacking (IOB) Meal Announcement Algorithm • Eliminates need for user to set or know insulin-to-carb ratios • No carb counting. The iLet only needs an estimate of the carbs in the meal – Usual for me, More or Less • Gives meal doses customized to the individual