Ergonomic Keyboard and Mouse Tray - Attaches to the underside of your desk for a space-saving setup. The keyboard slides forward and backward on an 18 track (Be sure to measure the underside of your desk to make sure the 18' track will fit!). Typing Comfort - Enhances typing posture and reduces wrist soreness with removable plush padding, a tilting mechanism, 360 swivel, and 5' of height adjustment.