Keyboard platform uses SmartFit System Measure, Adjust, Fit. Workspace that works for you. Easily set the keyboard position to match your SmartFit personal comfort color to ensure the most ergonomic positioning. Platform length is adjustable from 23.25″- 30.5″. Fully expanded, the platform has room for keyboard, mouse and other desk accessories. Detachable wrist rest with microfiber shell is included for even more comfort. Platform features a longer articulating arm and 21″ track to make it compatible with straight, diagonal, curved and 90 degree workstations.