Description These lifting workstations turn any desk into an ergonomic sit-stand station. Raise and lower with ease within a 19 5/8" range by simply pressing the levers on each side to engage. Two-tiered worksurface and keyboard/mouse platform for better ergonomics. Platform's rear-notched design accommodates most monitor arms. Neatly route cables behind display. Designed specifically for use with the Alera Monitor Arms. Smart space-saving design stays within your desk space and raises vertically within the Warranty: Manufacturer's limited five-year warranty.