The MMR-40 is a NMEA 2000 Network Controller engineered to add full-function, auxiliary control to MediaMaster source units. Outfitted with a NMEA 2000 Micro-C connector, the MMR-40 connects to a host MediaMaster source unit in two ways: Direct interface with a vessel's NMEA 2000 network using applicable NMEA 2000 cables and connectors (not included) Direct connection of one MMR-40 with one host MediaMaster source unit using MMC-PN2K powered network cables (sold separately) to simulate an isolated, stand-alone NMEA 2000 network Once connected, the MMR-40 automatically recognizes the host MediaMaster source unit and will then mirror all host source unit controls and screen info onto the MMR-40's full-color, 2.8-inch LCD display, resulting in a complete MediaMaster user experience. The MMR-40 is equipped with independent display theme and lighting controls for maximum mounting location flexibility, regardless of the settings on the host source unit. Engineered for real-world marine (and many outdoor) applications, its weatherproof (IP66 rated) chassis is built to withstand the harshest environments. In the box Wired remote controller Mounting hardware Sun cover Documentation Specifications Physical dimensions (Height) 3.74" (95 mm) Physical dimensions (Width) 4.65" (118 mm) Physical dimensions (Depth) 3.67" (93 mm) Control Surface Dust/Water Rating (when properly installed) IP66 Operating temperature range -4° F to +158° f (-20° c to +70° c) Warranty 3 years NMEA 2000® Len 4 (200 mA) Display size 2.8" (71 mm) Display type color TFT LCD, backlit Display resolution 320 X 240 Multi-language interface English Software updates USB Supported sources Derived from host source unit Supported audio formats (USB) Derived from host source unit NMEA 2000® ports 1 (micro-C connector) Usb 2.0 ports 1 (software update only)