I highly recommend these 4-in-1 cameras which work in analog CCTV DVRs (like your Defender DVR) and also 1080p HD DVRs because they are “hybrid”. That DVR is compatible with all of our analog CCTV cameras. The Defender Sentinel Pro DVRs are analog CCTV format (CVBS) that use coax cable and BNC connectors. Here is some information about security cameras that are compatible with Defender Sentinel Pro DVRs.
