Infinity's NMEA 2000 Black Box Stereo was once connected to an NMEA 2000 network and now can be controlled by another device, such as a manufacturer's NMEA 2000-enabled multi-function display, without any special setup or configuration. NMEA 2000 enables interconnectivity and interchangeability between marine electronics without a central network controller. MBB-400 N2K ready Bluetooth Audio streaming with ID tagging 4 pair pre-out front, rear, sub, and zone dual zone Subwoofer gain control SiriusXM Ready USB 2 Aux-inputs Weather band Infinity's NMEA 2000 Black Box Stereo was once connected to an NMEA 2000 network and now can be cont N2K ready Bluetooth Audio streaming with ID tagging 4 pair pre-out front, rear, sub, and zone dual zone