The LAST Voltage Regulators for the Externally Mounted X/ProFile. The X/ProFile Voltage Regulator allows the X/ProFile to be mounted in the original external Apple ProFile Case. These are the very LAST of these units that will be produced. You mount your X/ProFile(NOT INCLUDED) inside your old External Apple ProFile Case(NOT INCLUDED). It is mounted on top of the ProFile Power Supply. The Voltage Regulator is mounted where the old 5MB HD was located. Get it all connected and you have an externally mounted X/ProFile. Connect it to your Lisa 1 or Lisa 2/5 Parallel Port and RUN. Or for the Lisa 2/10, connect to the Apple Lisa Parallel Card. The Voltage Regulator Kit includes the V/R, Mounting Hardware, Cables, and Documentation on an SD Card. Shipping is EXTRA and depends on customer location.