Humminbird 408920-1 AS GRP Precision GPS Antenna

Humminbird 408920-1 AS GRP Precision GPS AntennaReceiver dimensions:  3.25″ diameter, 1.5″ high and comes with 20′ cable and has a 1″-14 thread count stem mountable with an optional antenna stem (antenna stem not included)Software must be 6.300 or higher for the Humminbird system to be compatible with the AS GRP GPS receiverCompatible with: all SOLIX Series*, all HELIX 12 Series, all HELIX 10 Series, all HELIX 9 Series, all HELIX 7 G2N Series, all ONIX Series*, all 1100 Series, all 900 Series, all 800 SeriesSOLIX and ONIX Series require purchase of AS GPS NMEA cable for connectionDesigned specifically to be used in a marine environment