A method and apparatus for using a general purpose input-output interface to test a user input device such as a wireless keyboard or mouse. The first phosphor has a peak emission wavelength in the range of from about 600 nm to about 700 nm, and the second phosphor has a peak emission wavelength in the range of from about 500 nm to about 600 nm. The blast media comprises a main ingredient of a glass frit with smaller generally equal amounts by weight of angular copper slag, spherical synthetic iron oxide and aluminum oxide. Movement of the housing also provides shock damping behavior. The illumination light source is arranged at a position where a mirror reflection region that mirror reflects light entering from the illumination light source to the sensor section is outside a region of the subject and the reference chart section. The panel may include a decorative scene that is viewable from outside the ornament structure, and one or more light sources may be substantially aligned with certain elements of the scene so that those elements have the appearance of emitting light that illuminates other portions of the decorative scene.