ARAMP1

Noob here. I bought a Lorex setup from Costco that I've been pretty happy with. (LNK71082T 8 channel which came with 4 cameras). I'd like to add a small dome camera, preferably 4K, into the mix. So, can I get just any ole IP camera, or are there things I need to look out for regarding compatibility? I've searched and can only find lists of Lorex cameras that are compatible. Just want to see what my are and what I need to look out for. Thanks for the help.