This is basically a clone of the Ace3DS+, running the Wood R4 kernel, which is just about the best kernel for playing NDS roms.
As you say, it will not play 3DS games, you need to put custom firmware on your 3DS and install the files as CIAs for that which is a bit fiddly, but not particularly hard, especially now hshop exists.
This is purely for NDS, and it's perfect for that.
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in the footer. You should not remove that because JavaScript files will not function.