Sit to Stand: This adjustable workstation allows you to find that needed healthy balance between sitting and standing throughout the long work day for increased alertness and productivity. The sturdy frame supports up to 22 lbs -Patented- Quick Transition: Experience smooth height adjustment in one easy motion using the innovative simple touch height locking mechanism allowing the riser to elevate straight upwards without shifting or wobbling (Adjustment range: 1.8 to 16.2)