Wired cameras offer a larger selection of cameras and more importantly, much better video quality than wireless cameras. Wireless cameras can somewhat be misleading as they need to be powered at the camera location. In addition, they require a line of sight with no obstacles, which often poses an issue.
Reliability and video quality are the main reasons that you should use a wiredcamera. Wired cameras are powered back at the DVR location and only a single cable (RG-59 Siamese coax power/video in one) needs to be run from the DVR to each individual camera. You can run cameras up to 800 feet (243.8 m) away with this particular cable. If going over 800 feet (243.8 m) you will need to use CAT5 cable with video baluns and/or amplifier.
Expect a much longer lifespan and much higher quality with wired cameras.
Obstacles are not an issue with wired cameras. With that in mind, occasionally you may have a location of two that absolutely need it. In that case, you can plug the transmitter to the back of the DVR.
