Installing outdoor advertisements and 3D displays require the knowledge of various installation techniques, precision and individual approach to every commission. This also applied to a 3D display that we installed for DELL. While working at heights you cannot make any mistakes. Twenty floors below our working area there were glass panes that could be broken by a single screw. The size of the display also caused us some difficulties. The advert was attached to the elevation with M10 needles and we connected the display to a switch gear centre. Despite poor weather conditions and the height we managed to execute the job perfectly.