There is provided an electronic device which includes a display device, a case configured to retain the display device, a stopper disposed between the retained display device and the case, and a component arranged in a space formed by disposing the stopper. The current methods and compositions further provide methods for isolating nucleic acids by reducing adsorption of nucleic acids by charged ions and particles within an environmental sample. Simultaneous engagement of the finger subkeys creates an input signal that corresponds to a grouping of input values, which are translated by software to display a word or perform a function.