Avoid repetitive stress injuries with the the Humanscale Keyboard Tray. This product improves your sitting posture and prevents pain caused by regular keyboards. This ergonomic keyboard tray comes with a clip-on mouse platform that attaches securely to your desk, allowing you to adjust the platform to the perfect height, depth, and lateral position. The Humanscale Keyboard Tray works for right-handed and left-handed users while protecting you against neck pain, back pain, and carpal tunnel syndrome. Keyboard and mouse not included.