The object of the invention is elimination of an occurrence of instantaneous light in the center part of a display, a border between the upper half and the lower half of the display. The determining unit determines a direction in which a specified mobile station that is to be spatially-multiplexed is located. A second material is then thermally sprayed over the inner portion to form the outer portion, and the second material includes a metal. Embodiments can be used in various Ethernet andor PoE implementations, including, for example, single PCB-single PoE, single PCB-multiple PoE, chassis-based switch, and stackable-based switch configurations. It is preferable that the concentration of the ethyl alcohol is 35 to 60% by weight, the concentration of the erythritol is 0. In some embodiments, the decorative cover may be, for example, a decorative tin having an inlaid design.