The WorkFit-S LCD & Laptop Sit-Stand Workstation clamps on to the front edge of your desk and uses the Ergotron's Constant Force spring lift mechanism to assist in moving the keyboard tray and monitor through the range of motion. The vertical adjustment range is 18", and the monitor mount independently can vertically adjust an additional 5". The desk edge must be between .47" and 2.4" thick for the clamp to function, the monitor must be between 6 and 14 lbs and the laptop between 6 and 10 lbs for the unit to function correctly. In addition, the maximum width of the monitor and laptop cannot exceed 21.25". The keyboard tray is 16.5" wide x 9.3" deep, and the slide-out mousing surface is 7.5" wide x 7.9" deep, and the maximum weight on the keyboard surface cannot exceed 3 lbs.
NOTE: It is recommended to strengthen the mounting point to prevent damage to the desktop.