Works to some extent already, is reasonably well in hand. Does not work as described through masonry. The biggest shortcoming is the battery compartment. Permanent the lid goes on. Man fumbles constantly because you herum.Legt him a little more firmly on the table, the tray opens. Who wants to work professionally with the Presenter should buy something higher quality. I will send the part zurück.Trotzdem, really ok for the money - who can forgive small weaknesses.