A:Answer Hello,
Thank you for reaching out to us with your questions. Yes, you will have a total of 3 power supply units. One for the DVR, one that supports 4 cameras, and another that supports 2 cameras.
Not all cameras are cross-compatible. Provided the model information for your current cameras we will be able to confirm if the units will work together.
Please contact our support team for further assistance if needed.
https://www.swann.com/us/contact-tech-support
Please let us know how we may further assist you,
Thank you.
JV
Swann Customer Support