Re: Huisun 10x PTZ v2 - Can anyone tell me what this threaded pin (with a ring) is fo
it's to pull off the front face of the v2 units so that you can access the screws to get at the sd card slot (and other guts).
it's not really threaded, but rather 'knurled', so you cram it into the little hole in the middle top and jiggle/pull until the face pops off.
i got mine off with a paper clip before they were including the little ring-thingees, but it does make it a bit easier...