This is a Classroom Performance System, otherwise known as CPS. It works with a classroom computer & allows for students to use remotes to answer questions. The set includes the case, 26 remotes, & a sensor to connect to your computer that reads inputs from remotes. This does not include the installation CD. I was unable to find it. I have enjoyed using this system in my classroom over the years, however my technology has changed and it's no longer compatible with my technology. Please inquire with questions.