WARNING:DVRs are outdated. Your options are: 1. Upgrade to a TVI format - TVI DVRs cost less than analog DVRs, use the same cable, are backwards compatible with analog cameras, and can also record HD TVI cameras. 2. Replace your existing system with an IP system. This will require both new equipment and re-cabling with CAT5 ethernet cable. IP cameras are the way the industry has been headed for some time now and are your best option. For other guides, please consider: To get a better understanding of the new technologies out there, please read this technology comparison To better understand why TVL definition cameras are being abandoned and aren't what they are cracked up to be, please check out these images. Our CCTV DVRs Available in Standard Definition and Widescreen Resolutions Monitor from Anywhere with our Included Apps. Will email you if someone trespasses on your property. Can automatically backup their footage onto your computer or NAS.