After doing some research, it seems a monitor with RJ-11 inputs will be quite expensive ($600 or more). A monitor with BNC inputs seems to be considerably less ($150ish). Therefore, if I opt to purchase a monitor with BNC inputs (I've only seen monitor with up to 2 inputs), how do I connect 4 cameras to it? Do I need a RJ-11 to BNC adapter with 4 RJ-11 inputs (female) and 1 BNC output (male)? If so, I can't seem to find one...
Also, what is the power adapter for?
Thanks!