Simply remove the desk from the box and place it on your standard work surface to begin enjoying the benefits of being able to sit or stand while you work.Within seconds you can easily transition up to 35lbs of weight between sitting and standing positions with a light squeeze of the spring paddle. The gas-spring makes the transitions smooth and effortless.Fitting on a desk area as shallow as 21in (533mm), and great for cubicles and corner workspaces, the desk moves straight up and down within its own footprint - never protruding beyond the desktop surface.. Fully Assembled setup is ready to use out-of-the-box. Professional Two-Tier Structure . SmartFit System simplifies ideal ergonomic height positioning . Pneumatic Lift with Tension Adjustment System . Space-Saving Design allows the workstation to move straight up and down within its own footprint. 22.8in (580mm) Height Extension .. 35lb (15.9kg) Weight Capacity supports up to 30lbs (13.6kg) on the main desk surface and up to 5lbs (2.3kg) on the keyboard & mouse deck