Product Packaging: Standard Packaging Handheld GPS Connection Kit connects your Handheld GPS Receiver to your Fishing System control head via an additional NMEA data cable (data cable must be purchased from your Handheld GPS Receiver manufacturer). This HHGPS cable requires a RS-232 or NMEA 0183 cable from the devices manufacture to complete the connection to the Hummingbird control head. Supported devices may include DSC VHF, Heading Sensors, GPS, and AIS devices. Your Hummingbird control head manual should be referenced to confirm which devices are supported. From the ManufacturerThe 7000301 AS HHGPS Bare Wire GPS/NMEA Connection Cable connects a hand-held GPS unit to your fishing system for easy readability of trackplotting information. By using the cable to connect the fishfinder to your handheld GPS unit, you can gain GPS trackplotting capability on the large display of your Matrix 700 or 900 Series unit. By using this cable to transfer the GPS trackplotting data, you can more readily view this information in an integrated form with your Matrix 700 and 900 Series unit. The kit includes NMEA connection cable, Y cable and detailed instructions.