HEIGHT ADJUSTMENTS: Smooth and stable movement allows adjustment from 6.89'' to 20.50" above your desk surface with 3 incremental height options, rear height adjustment levers. 6.89'' 13'' and 20.5'' ERGONOMIC BENEFITS: Extendable keyboard tray, staggered height between keyboard and monitor and 3 height levels as you transition between sitting and standing throughout the day. Novopal height adjustable desk supports a better posture and healthy wrist and arm positions. Helps enhance attention span and working efficiency. LARGE WORK SURFACE: 35.4''providing plenty of space for single monitor, dual monitor, and laptop + monitor setups. 9.5'' extendable keyboard tray to put your monitor at a comfortable reading distance. Lockable shelf provides extra space. STABLE AND DURABLE DESIGN: Gas shock rises and folds easily. Fits most desks in any office or cube. Sturdy black metal frame supports up to 33 lbs. FULLY ASSEMBLED: NO assembly, installation, or tools required. Comes ready to use out of the box.