Supported devices may include DSC VHF, Heading Sensors, GPS, and AIS devices. Your Humminbird control head manual should be referenced to confirm which devices are supported. The HHGPS cable is used to connect a RS-232 and NMEA 0183 devices to the GPS/NMEA port on a 300, 500, 600, 700, 800, 900, 1100, or HELIX Series products with GPS. This HHGPS cable requires a RS-232 or NMEA 0183 cable from the NMEA0183 device’s manufacture to complete the connection to the Humminbird control head. Humminbird 700, 800, 900, 1100, HELIX 8, HELIX 9, HELIX 10, HELIX 12, HELIX 15 control heads can supply power to the connected device. Humminbird 300, 500, 600, HELIX 5, and HELIX 7 control heads do not supply power therefore the connected device must be externally powered. The HHGPS Connection Kit Includes: NMEA connection cable and detailed instructions. Note: this cable should not be used on an APEX, SOLIX, ONIX or ION unit. For APEX, SOLIX, ONIX and ION Series, a AS GPS NMEA should be used. 1-Year Limited Warranty