External GPS/Iridium Antenna with Adapter Cable

Use the Garmin external passive antenna/extension cable when you want to install an external GPS/Iridium antenna. Magnetic for use on the exteriors of vehicles or buildings.

Compatible with the Montana 700i and 750i.

Antenna cable is 1.5 meters (4.9 ft) long; dongle, or adapter cable, is about 0.2 meters (8 in).