The seller discloses: Only used 1 time for configuring the wall of a ring. Leica Rugby 820 is a horizontal leveller with visible red laser beam. In the field you work with the included digital laser receiver Rod Eye 180 Digital RF. The laser receiver shows the deviation directly in mm on the digital display. In addition, it has a function to automatically search the receiver if you want to set a certain slope. With Leica Rugby 820 you can put fall/slope manually, in both X and Y directions. You measure up the desired case, which you set with the +/- buttons on the instrument. Properties Installation locks with the ability to set fall/slope in both X and Y directions. Visible red laser beam for indoor and outdoor use. Completely automatic setting of the horizontal rotation. This package contains: Leica Rugby 820 rotary lasers Nedo TN20K Flexilatta levelling rod 2.4 meters Leica Rod Eye 180 Digital RF laser receiver Loadable Li-Ion batteries and chargers Aluminium stand Koffert