FLIR’s M6100 Series DVRs use the latest MPX multi-format technology, giving you the flexibility to upgrade your security systems to 4K Ultra HD resolution using existing coax cabling.FEATURES:. With support for up to 4K HD resolution MPX cameras and standard analog cameras, the DVR is ideal for retrofit applications. The M6100 Series supports the most popular HD-Analog cameras. 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 1000ft (4MP), 500ft (4K).