If you're not familiar with cabling and what to use, we recommend a store like Radio Shack. Just tell them how far you wish to run the video cable and they will be able to recommend the proper cabling to you. Common attachments include adapters that will allow you to attach a BNC cable to the RCA connector on your camera. Adapters and cable ends typically cost just a couple of bucks. You may either manually select a camera to watch by simply flipping a switch, or allow the switcher to automatically cycle through your cameras.
Quads are more expensive than switchers.
It does this by splitting your screen into 4 sections. Similar to switchers, you may manually select a particular camera and pull it up to a full screen view. However, only live images may be brought up to full screen view. Although some quad manufacturers have included digital technology that can bring a prerecorded camera into full screen view, we've found that the image is highly pixalized and does not meet our standards. Multiplexers are the most expensive of the three.