An electronic device is provided that includes a user-interface feature, a detection mechanism and one or more internal components. Using a graphical user interface, a practitioner designates at least two trigger point icons, one upward-pointing and one downward-pointing, on a graphical representation of the reference biological signal. Consequently, side surfaces of the semiconductor film and the gate insulating film can be covered with the channel protection film formed in an upper layer, and impurities existing in a liquid crystal layer can be prevented from entering the semiconductor film by diffusion or an electric field, thereby improving the characteristic of a TFT. An opening is formed in the first side of the housing and defines a receiving location for the pole, situated between the top and base of the housing.