The present disclose relates to a mobile telephone, including a main body, a light source and an optical element. The attachment portion can be removeably secured to the container via a securing system. The top and bottom sections corresponding to one and the same turn are aligned with respect to one another and have a larger width than the width of the corresponding rising sections. In this manner, an IS administrator can keep abreast of the status of the IS infrastructure and its ability to execute business logic processes dependent on lower level software. The flat portion has the same plane with a surrounding area of the installation portion in a reflective surface of the reflective plate. The plate is assembled to the second receiving area.