A burglarproof lamp includes a lamp head part with a lamp head shell, a center contact bolt, a center contact insulation fixing base, a center contact insulation fixing sheet, a location post and a connection part fixing base. The improved method provides communications channel management that automatically opens the communications channel in response to a wake-up signal sent to a handheld computer from a peripheral device. the resistance of the electrode, or optically by means of the coefficient of reflection of the electrode surface of at least one electrode of the capacitive sensor. A thermal diffusion layer is interposed between the EL light-emitting element and the housing. In the recording apparatus, a warping part for warping the recording medium and supporting parts for supporting both side edges of the recording medium warped by the warping part are formed on a guide member disposed downstream of the recording unit.