The XTENDA Range Triple Mag Antenna uses ground plane technology. This antenna's mag base has three magnets that will secure the antenna to your truck, four wheeler or side by side under the most extreme conditions.

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Triple Magnet Long Range Antenna

This long range antenna features three magnets so that it can be affixed to the side of  your vehicle. The magnets are powerful enough to hold on in the most extreme of  conditions. This antenna uses ground plane technology so that it can extend the signal range of your Garmin products.