The MX12 NAV/COMM is designed as a direct replacement for the Narco MK12, Narco MK12 A, Narco MK12 B and the Narco MK12 DR NAV/COMM. The MX12 NAV/COMM will mount in the aircraft’s existing tray, and its connectors will interface with the existing OEM connectors. Since the original remote power supply is no longer required, a jumper plug is provided to make the proper interconnect for speaker, mike and power. If glide slope interface is required, an optional cable is available. See the owner’s manual for detailed specifications.