"One Knob Articulating Keyboard Manager. Save space and customize keyboard position with One Knob Articulating Keyboard Manager. This mechanism allows user to adjust the height, tilt and rotation of the keyboard position quick and easy via a single knob. The tray design is constructed of a durable particleboard and incorporates our patented Gel Wrist Rest. The mouse tray also includes a gel wrist rest and mounts to the right or left side of the keyboard tray and swivel out of the way when not in use."