Do all HD-CVI and PoE cams have WDR? or is that a TVL thing.

Hey guys.

Do I have to worry about looking for WDR on newer (2.1mp, 3.0mp, PoE, IP, HD-CVI) cameras?

I just want to make sure I am getting the best quality without spending a fortune. Dahua seems like a great pick, i just don't know if a WDR feature is of any more concern. I've tried looking for the answer but there was no clear answer.

P.S. I assume, with HD-CVI, PoE, and IP cameras, that it just comes with it. Maybe its just an enable disable feature in the cam

P.S.S. Or is it a feature on the DVR/HVR

Thanks guys