It comes with the case, but no charger. I don't know what I did with the charger, but it charges with a standard USB-C cable.
This device is android based and there is plenty of guides online on how to set it up.
I will do a factory reset on the device before shipping.
I attached the spec sheet so you can see the specs. It is the specs in the 'Base' column.
It should play everything through N64 and some Gamecube games.
It works great. I just don't really use it because I have a Steam Deck and Retroid Pocket.