Mobile Standing Desk easily adjusts in height so people of all heights can take advantage of the healthier option of standing while working. Desktop rises up to 49" and lowers down to 31" (above floor) to optimize the ergonomic work position. 40" wide top can hold up to two monitors, a laptop and more. Retractable keyboard tray (40" x 11-1/2") sits 4-1/2" below the desk (26-1/2" above floor at lowest position) for comfortable keyboarding when seated. Use as standalone workstation or as extension for your current desk. Grommet hole centered on the front edge allows you to route cables or install a monitor arm. Standing desk includes feet and locking casters so you can create a fixed or mobile workstation.