The invention relates to a display comprising parallel connection panels connected in an articulated manner to first and second parallel wall panels, forming a configuration of an articulated parallelogram movable between a working position providing shelves and a folded position over an inner face of the second wall panel. A recording head in accordance with the invention includes a leading module and a trailing module. Transverse movement of the trigger bar out of the hole is prevented by contact of the trigger bar with the frame as the trigger bar is pushed in either transverse direction. The inner and outer tubes further comprise inner and outer apertures, respectively, that are aligned by translating the outer tube. User-selectable manipulations of the MobilePointer can map to standard mouse events, which permits Applications to respond to standard mouse events as opposed to mobile device specific ones.