Conserve valuable fuel and anticipate problems with an at-a-glance view of fuel consumption and engine performance. View multiple gauges at once for the complete picture. Waterproof black box connects to existing NMEA 2000 network. Distributes NMEA 2000 data to all Ethernet-compatible Humminbird units on your Ethernet network. Easily customize data boxes. View data for up to two engines and two fuel tanks.