This is an Apple iMac 21.5" with a 2.7GHz Intel Quad Core i5 CPU. Although a late 2012 model, this iMac is equipped with a 500GB SSD, fully upgraded with 16GB of fast RAM and is running the latest Mac OS Catalina which it can handle daily applications and more very well with no glitches or hiccups. The cheapest iMac on the market at this point is around €1600, so this iMac is surely a bargain!

Photos of Mac OS and other details attached for reference.

Let me know if you want to see more photos or give you any more details.