Many Computer Modders or people own or have some type of multi function device they use to read temperatures and to control the rpms on their fans. Many of the current multi function devices use a standard open 5 bay, usually detected for cd roms. Enermax, a very well known and respected company has come up with a multi function device of their own that fits in a free 3 and a half inch open bay. Included in this package is the unit it self, Instructions, some tape for holding your thermal sensors in place and a set of screws.