My first system was wired. One of our coco palms was hit by lightning and one of the wires was close enough it fried the entire system. (I was equal distance from the palm as the CCTV wire was and almost got fried as well, but that is a different story). I had a computer monitor that was hooked up to my computer and the DVR so I could switch back and forth and when the CCTV system got fried it traveled through the monitor (without harming it) and into my computer, frying the GPU.
My next system was "wireless" meaning it had a complicated wireless process to make the DVR work but each individual camera still needed a power source. I'm still using it though some of the cameras have quit working and the system is not worth maintaining so it's basically become a "backup" video source until it's gone from component attrition.
I bought a camera to test it. It was optional POE or wireless with a USB power source. When I installed the included software to set it up it included a trojan that tried to use my computer to mine bitcoin for somebody. No wonder the camera was such a great deal. Fortunately I recognized that my fans aren't supposed to be running that loud when I'm not gaming or rendering video or something so I was quickly able to recognize and mitigate the problem.
Now I'm using another wireless system (still needs wired power). It stores the video and sound 24/7 on an SD card I can access anywhere with internet on the camera and stores "alerts" also in the cloud. It can also send alerts etc.
My next system was "wireless" meaning it had a complicated wireless process to make the DVR work but each individual camera still needed a power source. I'm still using it though some of the cameras have quit working and the system is not worth maintaining so it's basically become a "backup" video source until it's gone from component attrition.
I bought a camera to test it. It was optional POE or wireless with a USB power source. When I installed the included software to set it up it included a trojan that tried to use my computer to mine bitcoin for somebody. No wonder the camera was such a great deal. Fortunately I recognized that my fans aren't supposed to be running that loud when I'm not gaming or rendering video or something so I was quickly able to recognize and mitigate the problem.
Now I'm using another wireless system (still needs wired power). It stores the video and sound 24/7 on an SD card I can access anywhere with internet on the camera and stores "alerts" also in the cloud. It can also send alerts etc.