Track and monitor your dogs in the field and on the road with the Garmin DriveTack 71 in-vehicle tracker! Combine on-road and off-road GPS navigation by wirelessly connecting your Garmin Alpha 100, Astro 430, or Pro 550+ to the DriveTrack. See your dogs in real time on the large full color touch screen. It also doubles as a full on-road navigation unit and can even connect to your compatible smart phone. Packed with features that make it one of the best add-ons for your GPS tracker, you’ll never go hunting without it again!