Garmin Extension Antenna Cable 10m. This GPS accessory is built to exacting standards using selected top grade materials. Garmin GPS accessory extends your GA30 cable an extra 10 meters. Features of Garmin Extension Cable: Compatible with Garmin GA 30 GPS Antenna Built to exacting standards using selected top grade materials Extends your GA-30 cable an extra 10 meters Package Contents: Garmin Extension Antenna Cable