This Apple iMac comes with a 27" screen. It's an all in one unit. The RAM and Hard Drive have been updated. The 4 Terabite Hard Drive is combo drive, which means it is part solid state and part disk. It comes with the original Apple power plug. An Apple brand wireless keyboard and the Apple brand Magic Mouse. This iMac runs and has the latest Mac OS, High Sierra. It has a DVD/CD burner, SD Reader, 4 high speed USB ports and many other features. This is a 2009 model.