The MI-7137 under desk keyboard tray saves your space and helps improve ergonomics. Positioning the mount is easy, simply turn the knob to adjust tilt angle and height, and re-tighten to lock the position. The tray positions your keyboard and mouse lower and closer to your body, allowing you to adopt and maintain a neutral working posture. Correct wrist and typing posture is essential to preventing carpal tunnel and this keyboard tray comes with a gel wrist rest pad to reduce strain and soreness while typing and using the mouse. The mouse platform includes a pad with wrist rest, and the pad can be placed on the left or right side of the keyboard tray. Save space by stowing the mouse pad and tray under the desk when it is not in use. Hardware provided for mounting to a desk. Color: Black.