Garmin Asrtro's - Garmin Astro 320 GPS Tracking Collar w/ DC-40 (3 Dog Combo) Cost $460 USD Garmin Astro 320 GPS Tracking Collar w/ DC-40 (4 Dog Combo) Cost $500 USD Garmin
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Amazon.com: HQRP Extended Battery Pack Compatible with Garmin Astro System DC40 DC-40 GPS Dog Tracking System Collar Transmitter 010-11484-00 : Electronics
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