Height adjustment from 27.5-42 in lets you alternate between sitting and standing so you can change posture over the course of the day while keeping your work at a comfortable level. A gas lift mechanism raises and lowers the top smoothly, helping you reposition your laptop or notebook without sudden movement or noise. The 37.5 x 21.5 in work surface provides room for a computer and documents, and the ergonomic front edge allows a relaxed reach. Four rolling casters provide low-noise mobility while the steel frame supports up to 66 lbs for everyday home or office use.