Its the one with the layout shown on this article ( with the slide on/off switch )

https://www.photographypls.com/neewer-750ii-review/

It's called the 750II for Nikon, but they updated the design, even if you find it on amazon with the old design picture could be a try and error as they sent me a new design version.

I would recommend finding one on ebay or facebook marketplace with an actual product photo to make sure.