Just the unit and cable, which is all you need. Plug it in and hit Install. I've had it for about 18 months, lease ran out on the car so I don't need it any more. I might have the disc around somewhere, but you can download all the software from Cobb's website anyway (and get a current version) at http://www.cobbtuning.com/Accessport-s/70458.htm#/v/accessport/ap-manager.