Yamaha - Siren Marine Remote Cellular & GPS Antenna: Threaded-Mount Dome for Siren 3 Pro - SM-ACC3-RCGA-DOME - 6X8-85B84-00-00 Features: Enjoy the enhanced location and cellular connectivity reception for your Siren 3 Pro all with one combination antenna The Remote GPS & Cell Antenna Threaded-Mount Dome will extend the GPS and cellular range capabilities of your Connected Boat System strengthening the connection to your boat Compatible with the Siren 3 pro. M.P.N: SM-ACC3-RCGA-DOME 6X8-85B84-00-00 - Remote Cellular & GPS Antenna: Threaded-