Not sure how to check revision, nothing printed on it or the box to state as such, but the seller did state it was a v3 so just went with it!
Mine has had zero issues, even with the 128GB card full, it overwrites old videos no problem and carries on working just fine.
I'm trying to check out different resolutions/fps to see what works best as light levels fall with CPL installed, as there is some blur when freezing a frame so number plates aren't quite visible outside of dead centre as cars move - 1080P 45fps seems alright so far. 2560x1080 is the best quality though, especially with the custom bitrate firmware.