This is the same thing as the Amcrest AD410 which is a really great doorbell. I've used the Lorex version and I can confidently say that this is the best doorbell camera I've seen (I haven't used the Amcrest version myself, but I doubt there's any noticeable difference). The video a very sharp and just looks great. The audio is crisp as well. It can be added to
Blue Iris and most NVR's. It has an SD card slot on the back and the Lorex version comes with a 32GB SD card. They also come with vertical and horizontal wedge mounts. The Lorex Home app is decent. I haven't used the Amcrest app so I don't know if it's great, but from what I've read, there are some limitations. Feature wise, the main difference between the Amcrest and Lorex version is that the Lorex has an LED light on the bottom. This can be nice to light up the porch a little bit when the porch lights aren't on. The motion detection is very accurate as well. There are a few threads on here that reference the AD410. Like I said, they're the same thing, just rebranded.