2-Tier Ergonomic Adjustable Design: Thanks to its ergonomic height adjustable design, the computer desk allows convenient switch between sitting and standing modes for healthier working style. The height of upper desktop is easy to be easily adjusted in the range of 28.5- 49 while the lower desktop can be adjusted from 28.5 to 44. Spacious Work Space: The standing desk with large tabletop measuring 24 x 12 provides you with ample space to place multiple items. The upper desktop keeps monitors at eye level to help you work without too much exhaustion. Meanwhile, the lower desktop can be tilted to accommodate keyboard. There is also an anti-skid stripe to prevent items from falling. Smooth Rolling Castors: Equipped with 4 smooth rolling casters at the bottom, the computer desk is easy to be moved to wherever you want. The 360-degree rotation wheels make it easy to roll on different kinds of floors. Two wheels with brakes bring much convenience to lock the com