Up to 24in Monitor Arm Sit Stand Desktop This sit-stand monitor arm transforms your desk or tabletop into an ergonomic workstation. The monitor arm features a keyboard tray and easy height adjustment that lets you alternate between sitting and standing, without interrupting your workflow. Move your workstation up or down, left or right, to meet your needs. Adjust the height with one smooth motionAdjust your position, with one smooth motion. Simply lift the work surface up to 17. 7" (450 mm), to elevate both your monitor and keyboard. You can adjust the tension to your own preference. The monitor mount has a separate height adjustment of up to 4. 9 (124 mm) along the column. Optimum adjustabilityThis sit-stand monitor arm supports one monitor up to 24"". The swing arm swivels from -90? to 90? and tilts from -30? to 65? for ideal viewing. The VESA mount also rotates up to 360? for portrait or landscape orientation. Ample working spaceThe monitor arm features a large keyboard tray (17. 68