alarm systems house
Each camera will have a 12V DC adapter that plugs into a 120 volt AC wall outlet. How the power is run to each unit will need to be given some thought. This is not as difficult a hurdle though as having to run wires through walls. Summary Using a wireless security camera system with a DVR is a good option when adding wires is not an option. Keep in mind wireless doesn’t perform well in some cases and degrades with distance and barriers. One way to get a rough idea how well a system will work is to use a smartphone or tablet to stream YouTube videos and walk around to spots the camera will be located at.