Raise or lower up to 45 lb. from 5 to 20 in. for ergonomic work position for people of all heights. Retractable, ergonomic keyboard tray to keep arms and wrists in comfortable positions. Grommet mounting system for installing a monitor arms for 1, 2 or 3 monitors or hassle-free cable management. Will hold up to 3 monitors and a laptop. 5-year limited warranty. 46 x 24 x 20 in. Sold by each. Black.