Speco Technologies' color triplex multiplexer allows the viewing of up to 4 image sources on one screen, while simultaneously recording full screen images on a VCR and playback at the same time. It has an array of features. Viewing options include full-screen, multi-screen or sequential switching with adjustable dwell time. During VCR playback, full-screen and multi-screen viewing options are available. It is uniquely programmable for recording between 2 - 999 hours. It conveniently has a built-in time and date generator with an 8 character title function. The video loss alert and alarm detection are structured. The best part is the RMX-4CD's compatibility with all standard and time lapse VCR's and most DVR's.