PORTABLE & EASY MOVE - The height of this rolling laptop desk can be adjusted from 27.5"-45.3" as you wish, to sit or stand. 4 flexible rubber wheels with lock make mobile stand up desk move smoothly and stop wherever you want ERGONOMICS COMPUTER OFFICE DESK - Changing between sitting and standing helps you to relieve fatigue and avoid the health problems of a long time sitting. Standing computer desk promotes better posture, reduces back and neck pain, provide a more healthy working position for you