How do you get from here to there if your GARMIN GPS has an MCX connector but your GARMIN external antenna has a BNC connector Bridge the difference with this MCX to BNC adapter.Compatible with: Colorado 400i Colorado 400t eMap GPS 12CX GPS 12MAP GPS 12XL GPS 15 GPS 15H/15L GPS 15x GPS 15xH/15xL GPS 25 Series GPS 60 GPS 76 GPSCOM 170 GPSCOM 190 GPSMAP 175 GPSMAP 195 GPSMAP 60 GPSMAP 60C GPSMAP 60CS GPSMAP 60CSx GPSMAP 60Cx GPSMAP 62st GPSMAP 640 GPSMAP 695 GPSMAP 696 GPSMAP 76 GPSMAP 76C GPSMAP 76CS GPSMAP 76CSx GPSMAP 76Cx GPSMAP 76S GPSMAP 96 GPSMAP 96C