Garmin GA 25MCX External Antenna

For better reception in vehicle interiors, this remote antenna is the answer. It has a built-in, magnetic mount for the outside of your vehicle, and comes with more than 9 feet (3 meters) of cable and MCX connector. Size 1.8″ (4.5 cm) L x 1.8″ (4.5 cm) W x 0.6″ (1.5 cm) H.