Adding SVR to my account

Hello guys can you help me understand how to add SVR to my account, and if I even want to add SVR to my account. image
After I click add an SVR I get this → image
Now, I have two cameras installed. Do I have to buy a new camera for SVR or I can add SVR to one of the cameras I have. My cameras are ADC-V723 and a slim door bell camera.

An SVR is the Streaming Video Recorder, it is a hardware piece allowing 24/7 local recording for compatible cameras. See this page for info.

The 723 cams would work with the SVR, the Skybell will not.

After installation of the SVR, you would be able to create 24/7 recording rules for compatible cameras within