PlayStation 4 Slim (officially marketed simply as PlayStation 4 or PS4) was unveiled on September 7, 2016. It is a revision of the original PS4 hardware with a streamlined form factor. The new casing is 40% smaller and carries a rounded body with a matte finish on the top of the console rather than a two-tone finish. The two USB ports on the front have a larger gap between them, and the optical audio port was also removed. It ships with a minor update to the DualShock 4 controller, with the light bar visible through the top of the touchpad and dark matte grey coloured exterior instead of a partially shiny black. The PS4 Slim was released on September 15, 2016, with a 500 GB model at the same price point as the original PS4 model. Its model number is CUH-2000.

Information from Wikipedia.