Mount-It! MI-7957 freestanding sit-stand desk converter features two separate platforms, one to place your monitor and tablet, and the other to place your keyboard and mouse. There is plenty of space to keep accessories and devices nearby. The large freestanding base on this desk requires no modification, so you can set it up in a matter of minutes without the need for drills and tools. The height can be adjusted from 6" up to 19.5" from the base. Weight capacity: 33 pounds,Base dimensions: 16.5" x 19.5", Top tray dimensions: 25" x 17", Keyboard tray dimensions: 25" x 11", Height range: 6" to 19.5" from desktop.