4en1 cameras are the ones who can work on the 4 current analog video formats: HDCVI, HDTVI, AHD y 960H (PAL).
When used on a 5in1 recorder, this will be capable of using any of the video formats; when used on a pure HDCVI or HDTVI recorder, we will have to switch the camera to the format that the unit is capable of understanding.