Very happy with this refurbished product the unit looks new and so far has worked flawlessly. It has built-in speakers. It was very easy to upgrade to Windows 10. It does not have an SD card slot. The included dongle for wireless would not work with it as it was apparently only for Windows 7. It is very quiet much quieter than any computer that I can recall having. Hopefully it will remain trouble free for a few years. The included keyboard and mouse seemed okay but I just used my old keyboard and mouse I was considering putting my solid state drive from my old computer into it before I got it but this one boots up pretty quick it boots up in under a minute it has 8 gigabytes of RAM and 2 Tb of memory