When mounting outdoors or to brick or concrete, a mounting box is often required. The cameras pigtail (cable to camera connection) must be protected from the elements. If the pigtail cannot be protected by pushing the cable and connection back into a wall or soffit, a back box provides a professional and lasting way to protect the cable connections from corrosion.
Tip: We highly suggest you do not use electrical tape to wrap the connection and consider it protected, this is a guaranteed way to assure failure. Eventually the tape will crack, moisture will get in (with no where to go) and corrode the connections. We high recommend you use a back box for mounting outdoors.