The Multi-Function Cockpit Display Unit (MCDU) is hardware compliant with ARINC 739A-1 standards. It has a 5.7" color LCD screen that can be configured for night vision goggle use and customizable keypad and label legends. It interfaces through ARINC 429, RS-422/485, Ethernet, RS-232, USB and optional MIL-STD-1553. Additional options include video capture and Linux or Windows operating systems. The MCDU has a DZUS rail mount, alphanumeric switches, 640x480 resolution LCD, and meets various military standards for temperature, humidity, vibration and shock.