Standard Horizon Fixed Mount VHF - NMEA 2000 - Black. A single plug in interface allows connectivity of GPS data and DSC calling between compatible devices.Second Station RAM4 compatibilityNow compatible with Standard Horizon's latest second station microphone RAM4 model SSM-70. All functions on the main radio can now be controlled on the Second Station RAM4 this includes all radio functions DSC functions and intercom Features of Standard Horizon GX1850 Fixed Mount VHF AIS: No Built-In GPS: No Channels - Available: All US Canadian International DSC Class: D Hailer/Intercom: N/A NMEA 2000: Yes Power - Output (Watts): 25w Remote Mic Capable: Yes Scrambler Capable: No Weather Alert: Yes Package Contents: Standard Horizon GX1850 Fixed Mount VHF Standard Horizon GX1850B: GX1850 Fixed Mount VHF - NMEA 2000 - Black