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. 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).