A wiring substrate includes a lower insulating resin layer; wiring pattern layers provided on surfaces of the lower insulating resin layer; upper insulating resin layers; and via holes and via conductors connected electrically with at least one of the wiring pattern layers. The lightpipe body includes a receiving end portion for receiving the light and a display end portion. This construction allows the article to accommodate the contours of mattresses of varying thicknesses within each given peripheral mattress size classification. Lower magnets are attached to the top of the housing while upper magnets having the same polarity as the lower magnets are attached to the bottoms of the magnetic rotary plates to face the lower magnets. The modem portion superimposes the data signal received from the control portion on a power carrier wave and outputs the data signal to a power supply plug. Implementing these steps can result in enhancing the performance of reading, writing and storing binary logic information within the 1-transistor DRAM memory device.