This pneumatic, height-adjustable standing desk converter comes fully assembled and ready to use. Simply place it on top of your current desk, table, or work surface and have it operating in minutes. The Westbury easily adjusts to the exact height you need for correct posture and a more productive workspace. A gentle squeeze of the pneumatic air cylinder's handle quietly and effortlessly adjusts your desktop converter from a seated to a standing position in just seconds. Its spring-loaded bumper gently and smoothly raises and lowers the desk. Even when fully extended, the stability and durability of the Westbury mean no tipping, bouncing, or wobbling. Plus, its fold-flat design makes it very portable.