The Rocelco Height Adjustable Sit to Standing Desk Riser and Converter offers the versatility you need to get through your work day. Now you can sit part of the day or stand to take advantage of all the health benefits that come with standing and moving around. With the desk converter, you and your associates will become healthier and more productive. It fits over your current desk with no need to buy additional furniture. With its spacious 42.9" W x 20.5" D work surface, you can hold up to 2 large monitors, a laptop, and more. It also includes an extra large keyboard tray that measures 34.8" W x 10" D that is an ergonomic 4" below the desktop. Quick-disconnect keyboard tray allows portable use. Enhanced Vertical Range rises up to 21.7" and down to 4.7", to optimize the ergonomic work position for people of all heights. Straight up and down motion minimizes required depth (18.5"). Gas piston assist allows you to easily raise and lower up to 33lbs. 10.5" wide slot holds tablet or phone. Grommet hole allows you to route cables or add an optional dual monitor arm such as the .