Meets ITU-R M.493-13 Class D DSC (Digital Selective Calling)Separate Receiver for CH70 (Receiving DSC Calls)Ultra-Compact Case design (6.14"Wx2.4"Hx3.94"D)Built-in Integrated 66 Channel GPS receiver (GX1400GPS)NMEA0183 ConnectivityE20 (Easy to Operate) Icon & Menu SystemPreset key used to recall up 10 favorite channelsProgrammable Scan, Priority Scan, and Multi WatchAutomatic DSC polling of up to 6 ships GPS positionsDSC test call and Auto DSC channel change selectionNMEA Input and Output Connections to a Compatible GPS Chart PlotterProgrammable soft keysNoise canceling mic (with channel Up/Down, 16/S and H/L power selection keys)NOAA weather channels with weather Alert