FLIR’s M3100E Series DVRs use the latest HD-CVI technology, giving you the flexibility to upgrade your security systems to 1080P HD resolution using existing coax cabling. With support for both HD resolution MPX cameras, and standard analog cameras, the DVR is ideal for retrofit applications. MPX also facilitates advanced features previously unavailable over a coax cable including duplex transmission for PTZ control, audio transmission, and extended distance cable runs up to 2300 ft / 700m.PRODUCT FEATURES:- Supports 1080p (1920x1080), 720p (1280x720), 960H (960x480) resolution- MPX format is compatible with HD-CVI and analog- Standard BNC connection – ideal upgrade on existing coax cable- Supports both HD and SD analog simultaneously- Smooth real-time viewing with zero video latency- Extended cable runs of up to 2300ft (700m)- Two-way communication over coax allows for easy connection and control of PTZ cameras (PTZ cameras sold separately)