selinger

John, You don't need to buy two of the systems at all. You can purchase the cameras by themselves. The only other thing that you will be requiring is a POE network device that can push power to the camera. That's what on the back of the DVR. POE stand for Power over Ethernet. You can get out cheap with just Power injector for the power side of the network. Found those for $50 and the cameras for $150 on the internet. I just purchased this unit as well. I like the fact you can takes these cameras anywhere and plug them into any network and they still connect up to the DVR. The POE Ethernet connection is really cool too. I think you can also add different cameras too. I would be adding a Pan/Tilt/Zoom camera in the future.