Professional digital color quad processor let you monitor four cameras on screen simultaneously in Quad display, or individually in sequence on one monitor, it also has a PIP dual display which consisting of a main image with a small picture-in-picture window. This quad processor also can display 2 cameras in split screen. This color quad splitter transforms virtually any TV into a video security system. Just add cameras to creating your video observing security systems. Or feed the video to a VCR to complete surveillance video recording system. This real time quad outputs pictures in REAL TIME, so you’ll see events exactly when they happen! Compare that to other models that digitize pictures and sync them together, resulting in slow-to-refresh pictures, and you’ll see why this is the far superior unit. Among the powerful features are a digital playback zoom, audible notification of motion detected by the cameras and time/date overlay which documents the exact time and date of video incidents. Each camera can be individually adjusted for picture quality and titled for easy identification, such as front door, loading dock, cash register, back door, etc. In case of video cable sabotage or a simple bad connection the quad will alert you to potential problems with an audible video signal loss alarm.This is a pure plug and play unit. No software is required. The system includes an UL-approved AC to DC adapter (2A, 12V). Camera title, time and date display for easy identification. Audible video signal loss alarm 4 Channel BNC input and 2 Video BNC outputs