The OFM Model 5200M Height Adjustable Sit-to-Stand Medium Workstation has an ergonomic design and clamps to the top of an existing table or desk for increased stability. There is a groove in work surface to support a tablet or smartphone and an adjustable keyboard tray moves up and down with the desk riser. The large work surface with a separate keyboard tray is sturdy and stable even when fully extended. Symple Stuff Color (Top/Frame): Black