Kensington 60044 Adjustable Articulating Underdesk Keyboard Platform, 24-1/2w x 12-1/2d, Black Keyboard platform offers the flexibility to work comfortably from a sitting or standing position Adjusts to your SmartFit personal comfort color for perfect ergonomic positioning of keyboard and mouse Full articulating arm is 9.5" with track length of 21" Keyboarding platform offers 12.75" height adjustment to move 6" above or below desk with +/-15 tilt and 360 rotation Wrist rest with microfiber shell pad included