The Astro 430 with T 5 or T 5 mini device is the premier tracking system for sporting dogs. Track up to 20 dogs at up to 9 miles with high-sensitivity Garmin GPS/GLONASS receiver/transmitter. Provides enhanced map drawing capabilities, BirdsEye™ Satellite Imagery compatibility, and a 3‑axis electronic compass.
http://www.mapupdate.co/
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