A wireless communication system for supporting multimedia services provided to a user of a wireless transmitreceive unit which communicates with the wireless communication system. The seal body has positioning tabs or a centering hole to position a hand tool to facilitate bending of the metal seal tabs defined by the pre-cut slits. The peripheral wall of the resin panel has a welded part on its entire periphery. Then the projection of the energy distribution pattern onto the illuminated surface is generated.