MONITOR Port (BNC type): This port is dedicated to sending analog video signals to the main monitoring screen, or it can be used to connect to the Video In port of an external recording device (DVR/VCR) to record what the processor displays. VGA-OUT Port: A traditional computer port that allows you to connect the device directly to regular computer monitors (LCD/CRT) to display camera channels with better resolution and clarity compared to a regular TV output. And the appropriate conversions to connect it to your current monitor. The recording device is a 4-channel video processor for CCTV cameras (CCTV 4-Channel Color Quad Video Processor / Splitter), and it is used to combine and display video signals from four analog surveillance cameras on a single screen simultaneously. Basic Features of the Device: Screen Splitting: Allows displaying 4 cameras together (Quad Mode), or displaying one camera in full screen, or automatically switching the display (Auto Sequence). Control Functions: It has front buttons for controlling channels (1, 2, 3, 4), Zoom functions, and Freeze image. System Compatibility: Usually supports the two standard video systems NTSC and PAL.