Small Form factor. if you need an small computer for your home or office this could be the one. This is a Proprietary Case and Motherboard.  Not for use as a heavy gaming system. Runs Windows 10 great. Fast and smooth. However this i5 Processor is not compatible with Windows 11. Does come clean inside and out it looked new. Runs Quiet. Came with 2 Display ports and 1 SVGA. no Serial Port. Did have 10 USB 2.0 and 1 USB type C. no USB 3.0. I found the built in graphics to work but with the limited power supply would not recommend adding a Graphics Card. With the proper Display Port to HDMI does play excellent Youtube videos etc. I would recommend  a Sound Card.