Motion detectors are a vital element of a CCTV system. Your security cameras will always be on and ready to record, but there’s no need for them to record 24/7. When motion is detected, the camera will begin recording and transmitting video to the DVR. This is done by comparing individual image frames to the previous one and taking any differences into account. Motion detection means that your camera will record when someone or something approaches the camera. Only recording motion makes reviewing the footage much easier as you have a lot less to watch. In some cases, continuous recording is the best option, and this can be done if it works better for your home or business.