Quad Processor include Time/Date generation. This is a great function to have for evidence purposes. This unit is designed to input 4 cameras to one VCR or monitor. Simply input each camera into the quad, then connect it your monitor or VCR. In quad mode, all four cameras can be viewed simultaneously on one screen. In full screen mode, you can take any camera to full screen. In switch mode, the cameras will switch in full screen every 3 seconds. This is a must for a multi-camera security system. Includes 12 volt power supply.