In certain embodiments, a trigger assembly including a bi-stable switch system configured to selectively engage a portion of the sear in a first state and to transition from the first state to a second state to selectively disengage the portion of the sear in response to an electrical signal. The electrical stimulation therapy is configured to cause at least partial gastric distention. An atomizing device, such as a cartomizer, is contained and concealed within the open interior of the outer housing. By correcting the air-fuel ratio detection of the air-fuel ratio sensor with this output-characteristics correction value, the dispersion in the output characteristics due to manufacturing tolerances, aged deterioration, etc. A pressing board of the middle portion of the ejector pin upward presses the lower portions of the two spacing flakes. The system can be housed in a portable handheld housing.