How to Install Software Updates to My Garmin Astro 220 | Garmin Customer Support
The Garmin Astro 220 DC 30 Bundle GPS Dog Tracking System ($599.95 at Amazon.com, Sears, and REI) is designed for hunters and sportsmen but it also works for adventurers who run or
Updating DC 20, DC 30, and DC 40 Collars with an Astro 220 | Garmin Customer Support
How to Install Software Updates to My Garmin Astro 220 | Garmin Customer Support
Updating DC 20, DC 30, and DC 40 Collars with an Astro 220 | Garmin Customer Support