In order to set CCTV effectively, you need to read the manual of that camera. Apart from that, it's always the best idea to hire local CCTV installers for doing that work as they can finish that work effectively. I also used some Spy camera at my home which was ordered from "TITATHINK" and I asked a local installer to install that cam. It's been several months since I installed the camera and still, I didn't find any issue.