I purchased a Kingdel Windows 10 Mini PC from Amazon about two in September 2019 and was immediately impressed by it working right-out-of-the-box; there was no major effort at setting parameters for mice, keyboard or monitor as well as a bunch of other stuff.  Great and Great.  However one negative was that there was not one bit of documentation included - no paper or CD - absolutely nothing.  Bummer and Bummer.  If not for the documentation issue, in my opinion, this product would rate at a solid five stars.