It is a product of K&F CONCEPT, a Chinese company dealing in camera products. I don't know. [What's the selling point?] First of all, power is supplied by the included solar panel, eliminating the need for wiring. Whether it is wiring or an outdoor outlet, the wiring process is very troublesome, and if you need to drill a hole in the wall to do the wiring, you need to hire a contractor to do the work. It's been 3 days since I installed it and the built-in battery is currently full due to the nice weather. The image has been partially reorganized to protect privacy.) Although it says 1920x1080, as soon as the image is enlarged by pinching it on the smartphone, jaggedness appears, so at least the image received via the Internet is not very high quality. Images can be saved to the SD card in the main unit's slot, so while the quality can be high, (even if it is) it's realistic to pull out the SD card and see the recorded images every time. If it is installed at the recommended height (2-3 m) during the day, it is still possible to fully examine the person's facial features in the camera. However, this only seems to be the case when a moving object is detected. When a moving object is detected, the light will flash and appear to be shooting in color. [Sound quality] Not good enough They say you can talk through the camera, but when I mounted it on the wall facing the street in front of my house, I couldn't hear a moving car, but a howling sound, so I decided to use this device . It seems a little difficult to have a conversation about the camera. [Motion Detection] Excellent. When 6 is changed to 8 or 9, the detection rate increases, but for practical purposes, this level is sufficient.In addition, the video will be saved to the main unit's SD card at that time when a moving object is detected. It will be saved and you can call it up and check it on your smartphone. When you enter the date on this review screen, the time and snapshots are displayed in a row, so it is easy to pinch the screen while playing the accessed video, however. When you do this, you can't move the screen position, so you can only zoom in to the center. However, I don't think there are many people in Japan who drill a hole in the wall of their house and attach the camera to it. (See image) [Security] It doesn't seem to be too much of a problem. It might be good) When I reviewed the app, the authority was only given to the location information, so it's modest compared to other apps. I deleted the permission for location information after installation, but it is still usable. And there is almost no delay in operation. The only dissatisfaction is that this is a Chinese company product, but if you remove the authority, it seems safe.