I bought this Wi-Fi NVR from AliExpress for about $230. it is the worst picture I have ever seen. there is no way in the world that this NVR is 8 megapixel 4K. I have a 2 megapixel old camera and it is clearer than this one. there is massive pixelation and no matter what settings you try to adjust it does not help. when someone is standing about 15 ft away the face is pixelated and blurry you can't even tell who it is