Analog camera systems and packages for use in home or business. About 95% of all security cameras in the U.S. are still analog. We no longer sell analog systems that are only analog. Our high definition DVRs are now backwards compatible. Most of our high definition cameras are also backwards compatible. This means you can use our HD cameras with your analog DVR and/or you can use our HD DVRs with your older analog cameras. You can mix and match. You can purchase a DVR and use your old cameras until your budget allows you to upgrade your cameras. You can upgrade one camera at a time if you want.