Something important to note about outdoor housings is they output 24 volt of AC current. So when you are selecting a camera that is going to be placed outdoors, try to find a camera that is capable of 24 volts AC. Otherwise, you are going to have to run 2 power lines from the location, since you can't put a 24 volt AC device on the same circuit as a 12 volt DC device, which most cameras are. Many of the better cameras are dual voltage and can use 12v or 24v, so this eliminates the problem. Some of the issues concerning installations can be found in the How to Install portion of the web site.