The Backstage Magliner Vertical Keyboard Shelf with Mouse Pad is easily removed for compact transportation by loosening two prongs. This Keyboard Shelf can be installed in front or rear of cart. The keyboard locks in place when fully extended. The Mouse pad base will slide and lock to left or right side of unit, mouse pad base hides underneath Keyboard when not in use. It attaches to any Magliner or Liberator Vertical Sound or Video Cart.