External GPS for MR F45-D VHF RadioExternal GPS receiver. No more DSC calls without GPS data!Plug-N-PlaySimply plug in to the MR F45 MR F57 and MR F77 GPS VHF Marine radios. Also plug into your current Cobra Radio with one extra step of connecting power to the GPS.CompatibilityConnects easily to any competitor Radio or Chart Plotter with the included cable.WaterproofRated to IPX6 Waterproof specifications.56 Channel GPS ReceiverInsures reception of all viewable satellites in the sky.Simple InstallationSimple "Stick On" under the console. No special tools required for installation.