Fully adjustable keyboard platform features an easy color-coded window so you can adjust it instantly to your unique SmartFit comfort color system. SmartFit system chart (included) assigns a color based on your proportion, using your hand size. Simply select the matching color on the product and adjust accordingly. Low-profile articulating arm adjusts 6" in height and unlimited positions within that height range. Keyboard tray has a tilt range of positive 15 degrees and negative 15 degrees as well as a 360-degree swivel to match your SmartFit comfort color. Unique modular platforms attach to arm as needed for different-size keyboarding surfaces. Mousing surface can be used to the left or right of the keyboard. Included keyboard wrist rest has a foam cushion. Keyboard tray will work in standard workstations. Track measures 19" , and arm is 11" for straight workstations.