When I discovered that I had to have this module to set up my two PTZ cameras, I thought, "Oh No, this will probably cost about $800!!" You can imagine my surprise when I found out the cost was only $29.95. In fact, I like it so much that I bought one more PTZ for the front of my building, but it is not connected to the DVR. Recording on this camera is not as important as full time monitoring. So I use this module to control my lone camera.