The present invention inter alia relates to an apparatus, comprising a detecting arrangement comprising a first and a second detecting unit, wherein the detecting arrangement is configured to at least detect a partial attaching of an attachable unit to the apparatus and a complete attaching of the attachable unit to the apparatus, wherein the attachable unit is configured to be removably attached to the apparatus, and wherein the detecting arrangement is configured to only enable at least one function of the apparatus, when a complete attaching of the attachable unit to the apparatus is detected.
