Audio Detection is a highly dependable feature that offers a seamless solution for capturing conversations or important sounds that require recording. When enabled, it allows a security camera equipped with a built-in microphone or audio line-in to initiate recording upon detecting any sound. This eliminates the need to rely solely on video-based motion detection,...

What to do if hard disk drive can't be recognized? You can format the hard drive before using it. If DVR or NVR can't recognize HDD, we can try methods below. Install hard drive and put hard drive close to your ear to check if you can hear some noise 1) Open the cover...