Reviews on Amazon go back to 2015. Seems it was ethernet only, no wifi connectivity. HDMI out. HD no 4k.
It might still work ok, after sitting for years I'm not sure if missing upgrades etc ruins it, also at 6 years old it could work fairly slow. Technology advances and like the early days of PCs in the 90s & 00s the shelf life was fairly short early on, 5ish years.
If you plug it in & its annoyingly slow I would suggest buying a new one. Worth the money to not have slow load times & interaction. As someone above wrote tho, this is the wrong section of the forum for Roku Help. We are not Roku employees or staff, just users & channel creators.