Use all three platforms for a large mousing area or remove a platform to fit small desks. Adjusts 6" in height, +/- 15 degrees in tilt and rotates 360 degrees. Includes a keyboard wrist rest. 19" track, 11" arm for straight work stations. Color coded window lets you adjust unit instantly to your unique Smartfit® comfort color. Unique modular platforms attach to arm as needed for different size keyboarding surfaces.