MBB400 NMEA 2000 Black Box SystemInfinity'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-400N2K readyBluetooth Audio streaming with ID tagging4 pair pre-out (front, rear, sub, and zone)dual zoneSubwoofer gain controlSiriusXM Ready USB2 Aux-inputsWeather bandWARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.