An inhalation device for administering powdered forms of medication includes a housing with a rotatable dosing ball associated with an opening of a powdered reservoir located inside the housing. A lens with a non-spherical surface is located in front of andor behind the first narrowing. Further, each outer tube tapers outwardly, both externally and internally, in a direction from the bottom end toward the lower structural member and from the top end toward the lower structural member. Comparison logic in each register stage will compare the data of both latches, and integrate the comparison result to that of the previous register stage. When the user specifies automatic selection in the debugger statement, the program is analyzed, and a decision regarding whether to use line step or statement step is made based on the characteristics of the program and based on user-specified selection criteria.