Sit/Stand Desk Riser optimizes the ergonomic work position for people of all heights with its Enhanced Vertical Range (EVR) that rises up to 20" and lowers down to 5". Straight, up-and-down motion minimizes required depth. Extra-wide, 46" top holds up to 45 lb. and can accommodate three monitors, a laptop and more to maximize your work experience. Ergonomic, retractable keyboard tray also stores your laptop if needed. Power your devices right on the desk using the four AC outlets and two USB ports. Grommet hole allows you to route cables or add an optional desk mount. Monitor arms are not included. Desk riser works with optional Rocelco Deluxe Floor Stands (not included) to create a complete sit/stand desk.