Allows you to hold two monitors and/or a laptop. Sits on your current desk. Easily raise the large 45 x 22.6 in. desk and keyboard tray into continuous positions (up to 17.5 in. above your regular desk). Offers a 28.7 in. wide x 9.6 in. deep retractable keyboard tray. Includes a grommet hole for a double monitor arm or to organize cables. Provides dual gas piston lift assist that allows you to easily raise up to 40 lbs. Fully assembled.