4-Camera Standard Monochrome (B/W) Digital Quad. View real-time images on live monitor while recording to VCR. Automatic sequential switching with variable dwell and camera selection. Easy set-up and operation via push-button controls on front panel. Time, date and camera title displays on live monitor. Adjustable video gain control for each camera. View up to four live cameras simultaneously, sequence through all or selected cameras, or select one camera for full-screen display while recording to VCR in quad format. ~~ This unit is refurbished, and contains some scratches on outer cover ~~