Keeps documents between monitor and keyboard to help reduce head, neck and eye movement. Transparent back plate supports wide and heavy documents. Skid-free base. Angle and height adjustable. Can stand alone on desktop or hang over edge. Elastic line-guide enables easy data entry and helps keep documents in place. 18" Wide Backplate-300-sheet capacity. Holds: A4; Books; Catalogs; Legal; Letter; Mounting Details: Free Standing; Material(s): Plastic; Sheet Capacity: 300.