Hi
@Rockky
iirc most if not all of Amcrest's IP POE cameras are Dahua OEM products.
I would expect that this PTZ may also be a Dahua OEM product - though I do not know for certain as I do not recall seeing a similar one in the Dahua OEM international catalog.
Naturally when this goes for $50-60 on sale you can imagine there will be some compromises to the build quality when you compare it to outdoor rated cameras, still for an indoor camera it seems to be very popular with consumers.