Modern CCTV systems allow you to monitor areas from on site or anywhere else in the world using an internet connection. Recording events based on motion detection saves hours of time reviewing old analogue tapes. Cameras themselves may be visible so that their presence will help deter theft rather than just identify the thief, or they may be covert to uncover the perpetrator of persistent thefts. Technology now even allows us to view a room in complete darkness as if the lights where turned on.